IŽd like to share some findings when I built my first mtx4 kit. Hope these tips help new owners!
1) sets screws on page 11 for the 2 shoe speed are 4mm, not 3mm like on the manual
2) silicone use is mandatory if using the front diff with diff oil, not for spool.
3) the ball links of the steering rods need to be dremel if using the standard belt tension in the front
4) i used 1.5mm washers on the rear shocks lower cups to keep the shocks straights due to the 4mm shock tower
5) with the 24mm pulley, I dremel the graphite plate to gain more tension for the belt, and I used 2 0.75mm washers between the plate and the base to avoid contact with the engine mounts, worked perfectly and now your even most used urethan or rubber bands wonŽt be loose.
6) I used the rubber spacers that came with my servos to avoid the throttle servo to be in contact with the chassis.
7) the 3rd post I used is a mtx3 rear body post, screw to a small plate on one end, the other end is screwed to the steering post. now my 3rd body post is on the windshield, not on the hood.
8) I used 3x10mm caps screws for the engine and 3x10mm for the chassis engine screws, 2mm extra tightening.
9) waiting time for new ninja 12, yellow shoe and new super harder spring, 3 weeks from now