Hi all,
For those considering pulling the trigger on the Hcigar version: Do it. I have an array of mech mods (best of which, a real gp paps) and I actually find myself picking up this little guy the most often. Hits very hard and is the shortest native 18500 mod I have found -- it marries beautifully with the kayfun, as shown earlier in this thread. Having the option to run an 18650 for those times I do go sub-ohm is great, too. Hell, even in 18650 mode, this thing is *still* shorter than the magneto in 18350 mode!
A couple tips: Mine came highly polished, which I hate. Even though it is stainless, to my eye, it makes it look like chrome. Very, very easy to fix... Use an old carto to mount it in a reversible drill (and run the drill so the device is spun opposite of the the body tube threads) and get a scotch brite pad from the supermarket. High speed for 3-5 minutes, keeping even but very light pressure and you'll end up with a perfect match for the kayfun brushed finish.
As for the switch, it is too light, which leads to wobbling and autofiring when you set it down. Two tweaks resulted in the best switch I own:
1) Add an extra, light spring. In fact, the springs meant for the gp paps fit *perfectly* inside the stock spring (to be clear, I am now using both springs, one sitting inside the other)... you can pick some up from domo vapor.
2) Add an o-ring to the base of the contact screw. This needs to be tiny, and in fact, if you have a bag of kayfun extras, the smallest o ring they provide (meant for the fill screw) is exactly the right size. The o ring will cut the length of the throw in half -- and it will also stop the screw from coming loose with use. The end result of all this is a switch with a throw a lot like my gp paps, but a good bit firmer. I don't worry about it firing on its own at all, even when being absent-minded and throwing it in a pocket without locking it. And it *never* misfires, no matter where or how I press it. It feels *great*.
To the earlier poster (or anyone who knows): Thanks for the magnet measurements. Did you ever find a source for magnets the right size? I'd like to try this out, too!
Hope this is helpful,
Steve.