Chassis Barce mod
I have a new mod but have not taken pictures yet.
The Matrix TR Arena has zero chassis flex, so the chassis won't bend and your clutch bells will last a very long time. But on bumpy tracks and very dusty tracks, chassis flex helps the vehicle handle better and gives it more traction.
If you want more rear traction, take the rear chassis brace and cut all of the ribs out with a dremel cutting wheel. Then cut a section of the sides on both sides in the middle. This will allow the rear of the chassis to flexx forward slightly and twist some.
If you want more steering, do the same to the front molded chassis brace. Take a little off at a time and then check your acheived flex. Cut more if needed but don't cut it down too much or it can break or cause too much flex allowing the clutch bell/spur gear mesh to change.
I tried this mod and it made a big difference. I'd recommend getting an extra set of braces so that you can quickly change then depending on track conditions.
Part #'s
MX313
MX303