You must be running a ultra soft setup to be wearing the rear skid so much, I've been running the same rear skid for over a year, couple hrs a weekend On indoor clay and it's hardly worn, also run the DE front bumper. I'm runnin the original ghea pistons with AE 40wt and minimal droop. Last forever. The only time they rub on mine is when clearing a 35ft 6 pack lol! This was on the Tekno V3 chassis though, I just put together a Tekno V4 chassis and the DE rear skid looks great still, just a couple mild scratches. Guess it depends on where your running and the setup used.