For the record there's just no upside to ss, it's heavy and it conducts like siht. .. the deal with making mods put of different materials is that it's not just basic drilling, to get the holes for the batt/bottle I have to use progressively bigger bits then a boarding bar to open up the hole to proper size, I don't just have a droll bit that's the size of a bottle and one for a battery, doesn't work like that. Opening a hole three inches deep is a hard thing to do, a boring bar isn't really supposed to go that deep, even on my mills, and my equipment is way overkill for making mods.
Aluminum is definately the nicest to work with, especially when your doing stupid things like using a boring bar to open a hole three inches deep. The 26650 mods are the worst, that's a 26mm+ hole vs a 18mm+ hole so the bar is pushed 7-8mm off center....it's a tough cut on equipment, when you throw different materials into the mix it just gets harder. Like titanium for example the things I get away with no problem on aluminum get exponentially tougher on tools. With titanium it's worth it, stainless just isn't.