The JG-100 (JMP-3000) picture above shows the configuration that I have, with the aluminum can. According to Chris, it is stiffer than the steel can and he can annodize it to many different colors. I have a bunch of Hot Spot flights on it and it has been wonderful. If I remember correctly, it was supposed to be 27 lbs at 126k RPM, but wait for the TJT web site to be sure and Tom may change that with his ECU (which, by the way, is supposed to be really nice!).