Hey Tom. Got my four upgraded Cam-M's today and I'm pretty stoked. I've only had the chance to set one up. Stripped it and cleaned all the contact surfaces and applied Deoxit. Set it up with my standard build, dual 8 wrap 24g nichrome, clocking in at .22 ohms and it hits better than ever before. Did a quick test with an in line volt meter. Got 4.2v from a fairly new pair of VTC5a batteries, and a very respectable 3.81v with the atty included.
The bus bar feels far superior to the braid used in my first upgrades, and the adjustable VT 510 is now stiff enough to hold atties firmly in place.
It really feels much more solid and hits better than ever before. My only hope is that it won't leak under the button any more. I'll check this one in a few days and see if it's dry.
Lastly, the new screws are very nice as well, just wish they were slotted cause I don't have a hex driver long enough to reach them. Was able to get at them with the right sized flat head, but I know that isn't ideal. What size bit do I need for these new screws?
If any of you have an M lying around that you gave up on, I would highly suggest sending it in for the upgrade.
BTW Tom, have you considered making your own dual battery mech mod? I know it wouldn't be as economical as starting from a clone, but I'm sure you could design something great.