I have Smokeless Image spinner batts, and thusly use 808/ego threaded T3s from their site. In moving up to a mod, I really want to stick with T3s and it would be great if I could just buy new heads to save some cash. Just wondering though if all T3s are the same. I'm not sure if SI sells genuine Kanger T3s or just generic clones. Wondering if anyone knows if any 510/ego T3 heads will fit in any T3, even if that T3 originally was made for 808/ego heads?