Hmm, i think the pitch that is written on the manual for the 415 (0.4-ish) is the same as 64p, but i'm probably wrong
btw, what do you think of the low friction suspension shafts and balls? I did just replace my orginal ones, and the A-arms slid on these shafts much easier. I don't think they're so much smoother though, but they're hop-ups for god's sake!