I love my SC10 4x4 but one thing is a real pain, changing or adjusting the pinion. It basically requires you to pull the entire motor out. So I decided to do what AE should have done for us. I drilled a hole thru the bottom of the chassis that lines up with the pinions grub screw. So now I can stick a wrench in the hole and loosen the pinion grub screw to adjust or remove the pinion. I used a small foam wedge to seal the hole from the inside. See my post on RCShortcourse. http://www.rcshortcourse.com/forum/s...774#post189774 for the gory details (it's a long post and I didn't want to clutter this thread).


With a small hole in the bottom of the chassis I can insert a 2mm hex driver and loosen the pinion grub screw without removing the entire motor.


Small foam wedge seals the hole from inside.


Here is the bottom of the chassis. The hole is where the rear chassis slopes so it won't snag on anything and is small enough to not compromise the strength of the chassis.