Reo Mod - Modding for improved flat top battery firing pin contact
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Thread: Reo Mod - Modding for improved flat top battery firing pin contact

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    Default Reo Mod - Modding for improved flat top battery firing pin contact

    So, I am new the world of Reo's. About two weeks ago I received my Reo Grand. Since I was busy doing micro coil wizardry with super_x, pdib, statistic and whole bunch of other guys (gals?) over in the other Micro-coil thread, the transition was easy. I really enjoy all the features that the Reo has and I wont re-cap, you guys know what they are.... So why am I posting?

    The one issue I have with the Reo is a periodic misfire. It only happened to me recently. I mainly vape sub-ohm coils so this may add to the effect. My understanding is that this occurs because of oxidation. The only solution I could find is to file down the firing pin and reapply Noalox, The fix worked to correct issue, but it return a couple of days later. The issue happens more often with flat tops than with a button top. So I took a closer look at the firing pin connection to the positive terminal of a flat top. Apparently, there is an arc'ing effect which I believe is due to the small surface area that makes contact. At the end of the firing pin is a slight curl and contact is not optimize for lower ohm coils IMO. Here is what I saw:




    So to address the surface area contact, I placed a thin strip of copper (.2mm thickness) around the end of the firing pin. The copper was thick enough to be able to conform and "lock" onto the end of the firing pin with a slight pinch from a needle nose pliers.




    The contact point is formed to increase the potential contact area and is adjusted so that inadvertent firing on the atty can not occur. I have tweak it to also work with button tops as well. There is enough play in the switch throw to accommodate this.



    The result is very apparent, no misfires, instant on connection and full power delivery. When the device is lock it will not fire.

    The usual disclaimer applies here. Mod at your own risk. This mod can result in a very bad situation, if you dont know what that can be, then dont do it.

    BTW, this is my new addition and current favorite device.


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    REOnaughty Verified Member
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    Brilliant...


    edit to add: I haven't had any troubles with the recommended batteries, at all. I have had trouble using non Rob Approved flat top batteries.. I imagine this slight modification would help with making a good connection on those flat tops.
    Last edited by Statistic; 08-03-2013 at 05:12 PM.


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    OK, noob question ........I can definitely see the advantage of optimizing contact etc with this awesome mod (nice job). But are the extra oxidation, misfires, etc even an issue if I'm not sub ohm vaping?

    [I've only had my Grand for two weeks. I already had some flattops (panny NCR18650PD-2900mah). I've been using them with no problem (I know its only been two weeks) and all of my coils are 1-1.7ohm.]
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    Registered Supplier - Offline ECF Veteran pdib's Avatar
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    Cool, gdeal. I had thought about doing that back when I first had issues, only with some brass shim I have laying around from pinhole camera days. I emailed Rob to check against his knowledge of the REO. He said that, in designing it, he had tried a lot of shapes and sizes of tips for the firing pin, and what he's using worked the best. He said that a larger area of contact proved not to work as well. I decided to rely on his experience and his "been there done that" feedback. If this proves out, my hat is off to you, tho!

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    Registered Supplier - Offline ECF Veteran pdib's Avatar
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    Quote Originally Posted by elscorcho View Post
    OK, noob question ........I can definitely see the advantage of optimizing contact etc with this awesome mod (nice job). But are the extra oxidation, misfires, etc even an issue if I'm not sub ohm vaping?

    [I've only had my Grand for two weeks. I already had some flattops (panny NCR18650PD-2900mah). I've been using them with no problem (I know its only been two weeks) and all of my coils are 1-1.7ohm.]
    The flattop issue seems to be exacerbated by high current draw. Meaning, don't worry about it. You're not going to break anything. If your firing pin requires more maintenance, and you wished it didn't, you can deal with it then. (probably won't be an issue, tho)
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    Quote Originally Posted by pdib View Post
    Cool, gdeal. I had thought about doing that back when I first had issues, only with some brass shim I have laying around from pinhole camera days. I emailed Rob to check against his knowledge of the REO. He said that, in designing it, he had tried a lot of shapes and sizes of tips for the firing pin, and what he's using worked the best. He said that a larger area of contact proved not to work as well. I decided to rely on his experience and his "been there done that" feedback. If this proves out, my hat is off to you, tho!
    If Rob tested and optimize the firing pin shape. I trust his work. But, based upon my device and usage with my batteries that have scraps and marks on the positive terminal from screwing down the atty, this mod eliminated the sparking issue for me. The first pic in the OP was right before the mod was made. After the mod, no sparks.

    All my pulses are now solid with flat tops. Its only been a day so I'll post back (good or bad) on the durability of the copper.

    BTW, thanks for originally "sparking" my interest here. I dont think I would have purchase a Reo with out your inspiration.

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    I was hoping to just take a pic of what i do - but lets start at the point of melting buttons - because i use the biggest batteries i can fit inside a Grand and 1 Ohm coils.

    4 melted buttons later it occurs to me that a rectangular button pushing on a pin that travels in an arc is not cool. My button mashing technique may not be the best and perhaps something with a more rounded shape might help and also make it easier for a hamfisted fool like me to vape and not constantly wreck things.

    So what i do is use a nickel plated rivet $3 for a hundred i think at hobby lobby that i butchered and epoxy glue it on the firing pin. Just for aesthetics i paint it in ceramic black paint, but the paint alone was useless.

    buttonmod.jpg

    i realise that a few of you will think that modifying anything about a Reo is sacrilege, but my huge cloud says not!

    While we are on the topic let's be very clear about what the dangers are - i am not content with just messing about and using a random disclaimer 'anything you use may come back and bite you'
    So here they are:

    If you short a battery, whether it's your crap coil on an atty or not - your battery will get very hot - very fast. It will likely vent in the case of an IMR = crap all over the room like tinsel at Xmas only wife is not feeling very Xmassy.

    If you are totally reckless and use lithium-ion batteries without care then they will explode with subsequent loss of teeth/face or (imagine it's in the front of your jeans...) worse!

    If life were as simple as just throwing things together with no understanding then we'd all be gods, but we're not!

    T
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    Forum Supplier ECF Veteran redeyedancer's Avatar
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    Hello gdeal When I first starting selling mods all the mechanical mods positive contacts were flat . I had more inconsistency with this type of setup .
    I am not saying this wont work better for you we are in a totally different world now with sub ohm vaping . I run a grand daily at about .8 ohm and dont have the problem . I am not sure if going lower in ohms aggravates the situation I would need to do more testing . I use and recommend aw imr button top 18650 batteries and only need to clean my contact a couple times a year . I highly recommend trying the correct battery for the mod .

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    Quote Originally Posted by redeyedancer View Post
    Hello gdeal When I first starting selling mods all the mechanical mods positive contacts were flat . I had more inconsistency with this type of setup .
    I am not saying this wont work better for you we are in a totally different world now with sub ohm vaping . I run a grand daily at about .8 ohm and dont have the problem . I am not sure if going lower in ohms aggravates the situation I would need to do more testing . I use and recommend aw imr button top 18650 batteries and only need to clean my contact a couple times a year . I highly recommend trying the correct battery for the mod .
    Yep, all I've ever run are the recommended AW IMRs. Never had a misfire. I just can't make these guys fail. I did notice, for the first time EVER, a slight drop in performance last night with my most used grand and simply hit the point with a tiny dab of noalox and it is right back to where it was. A beast.
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    Quote Originally Posted by gdeal View Post
    If Rob tested and optimize the firing pin shape. I trust his work. But, based upon my device and usage with my batteries that have scraps and marks on the positive terminal from screwing down the atty, this mod eliminated the sparking issue for me. The first pic in the OP was right before the mod was made. After the mod, no sparks.

    All my pulses are now solid with flat tops. Its only been a day so I'll post back (good or bad) on the durability of the copper.

    BTW, thanks for originally "sparking" my interest here. I dont think I would have purchase a Reo with out your inspiration.
    Well, its a solid idea and well executed. My brass shim is thinner, and would have required more monkeying around. I am indeed interested to see it work! Like I said in my PM, I too chose the route of vaping thru my flattop investment. If I'd have seen that pic a couple months ago, you would have had me trying it fo' sho'.
    X-Puppy likes this.

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