[What's_nitro?]

I was playing around with the Rustler the other day and I though I would test fit a pinion on the motor to check clearances and w/e. I noticed that the pinion and spur would always make a noise that sounded like tight gear mesh but they had plenty of play. If I backed the pinion off enough to get rid of the noise it barely made contact with the spur. I was wondering how you should set the gear mesh with the Mod 1 gears? Can you use the "sheet of paper" method as with the 64p gears? I tried that but it seemed really tight. Do the gears have a break-in period? That would be wierd.