renoman: no problem getting those measurements. On the size comment, I too am a little phallic sensitive. You ARE RIGHT this thing can stack up fast and get real long. But likewise it can get real small! That's the beauty of it. I puff under a lot of configurations & the MKB-TS handles every one. A carto down in the collection tank & a single 18350 allows me to hide it in the palm of my hand. But when I'm doing an HBO marathon at home I hold it at roughly 10" with an 18650, kicked, and a full Terminator C. Basically whatever I want I can stack it to work out. I do STRONGLY RECOMMEND the center post modification if size is your concern however. And I would check if you can source material for shimming the switch before ordering. I haven't looked back on my MKB-TS purchase since making those enhancements. Sorry if I'm helping to spend your money, but this is the easiest big-boy MOD to get your hands on & for me completely cured the GG envy. I have a Nemesis too & frankly I can do more with the MKB-TS.
dwcraig1: Thanks for keeping us in the loop. Sorry to hear about the GM switch not fitting. A suggestion: if the existing hole for the factory switch is not going to suit your GM-sw drill-&-tap measurements, consider preserving the factory hole, and instead create a new hole on the opposite side, 180 degrees from the existing. Yes, that would leave a hole in the MOD, but you'd have more material to work with for a clean tap if you started your own hole & you wouldn't defeat compatibility with the Chinese parts in case Rainbow offers an upgrade. There are clear signs of heat stress already around my switches' factory tap. Since SS is kinda cracky, you may have better luck if you avoid a spot that's already been unevenly heated. Don't mean to bring worry into your project, but hope I can help brainstorm.