Tekno is out. Too expensive, too much of a hassle to get it here in Europe, and I don't want to be limited on the size of motor I can run.. Not sure if it's true, but I've been told I can't run my Ripper motor because it's 40mm instead of 42... Anyway, this is definitely meant to be a cheap conversion.. Not racing or anything.. I also want the option of switching back to nitro if/when I want to..