I stripped out my gear the other day; My pinion was only meshing halfway on the gear.

I had upgraded my M05 to a M05v2 so I a unclear on how many mm distance from the endbell of the motor to the to top of the pinion should be so I get a full mesh of pinion and gear.

I think the instructions say 16mm, but I don't think that is enough.

What are other people doing in this area?