There is no stage 3 motor for the Gen 1's... And yes, the stage 1 arms are the same [I think]. All in the gearings. Same with the stage 2 arms. But they have a lower wind count [Correction?] You can pop those into a Evo can with ease, but you would have to remove the pinnion from the S1/S2 arm first. As for speed, not quite sure. I'll let Red, or XMDrifter take that one.
Back on topic, how great would one of those motors be on the track? Thinking about comparing a couple motors from different places/modders.
Quick! Someone get Red's homework done! So he has time working on the different winding patterns and such!! Hurry!!