feigao xl shaft long enough for 3905 maxx?

[sikeston34m]

The current Novak shafts are 15mm long as shown in the picture.

For a motor shaft to go the full distance through the hole of the pinion, the shaft has to be 20mm long.

I hope this gives you some idea. In my Opinion, there are some pinions that will work with the shorter shafts and some won't.