Fat Daddy 510 bottom feed

I looked around a bit on this but I'm a little lazy ...anyone use one of the Fatdaddy 510's to bottom feed?...I got a couple and a quick look tells me I can complete the hole drilled in the pos. pin and solder a tube but does it leak because of the spring mechanism?

Anyone with any experience on this would be appreciated...

 

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So I drilled out the center pin (more like completed the wire hole already there)...I then dug through my crap box and found one of those needles used to pump up footballs/soccer balls...I got lucky and it "just" slid in so I soldered it up and trimmed it for length...

I put it all together, screwed on an RDA, attached a bottle/tube and did a test squonk...and it leaked all over the place. But, the culprit seems to be the o ring, I changed it out with a larger silicon washer I had from my RSST days and it works great.

I think the issue may be if you have an RDA with a shortish 510 that doesn't force the center pin down far enough, the stock o ring doesn't make the seal between the pin and the brass base the pin slides through (I don't know how else to describe it, if you have one you'll know what I'm saying)

 

Same...my journey went from getting tired of messing with the MV el crappo "large hole" connectors , then I bought a 7mm x .5 tap and played with some fringe ideas (with mixed sucess) then as the RDA "clone wars" started and you could drill holes in them and not feel bad I realized that I don't swap RDA's once I get a good set-up so I just said screw it and started making custom RDA center pins and hybriding them to mods (negating the 510 altogether which ultimately works the best if that's your gig and you can make mods to go along with them)...but now that I got the FD 510 to bf with no leaks...hell, for $5...I've spent $5 on stupider things

 

3mm is a bit shy, as soon as you wrap a wire around it for power you don't have much left for a tube...

...as much as I appreciate the bf love, come on, go 5mm or even more and we'll cut to suit...I'll just stick to modding the stock ones. just saying...

 

I took out the stock o ring and put in this silicon "washer" type o ring I had in my crap box (no idea what I got them for originally) zero leaks.

As far as it being brass, meh, doesn't really bother me... just give it the vinegar/hydrogen peroxide bath for 5 mins. Plus if it was SS, even with the Ruby flux, getting it hot enough to take solder without melting your seal (which has to be installed first) would be next to impossible.