RE: HPI E-10 vs. HPI RTR Sprint 2 Sport
ok your going to have to take your car apart to do the rear diff mod but you have to take it apart to change the belt anyways. basiclly take a dremel and cut along the lines showed in the picture. that allows most stuff to pass thru without getting stuck. its a simple mod that helped me out alot. ive had the car for a year and onli had to change one rear belt and that was before i did the mod. im still on my original front belt