CD\'s are skipping, help New Rockford head unit. Mounted in dash with adaptor plate, home made out of sheet metal. I know the lifted blazer with BIG A$$ mud tires isn't gonna ride all that smooth, but man this unit skips at every little bump, even dips in the road. Hell, it skips when my tranny goes from 1st to 2nd. What can be done? Note: I dont have any sorta strap on the rear of the unit back behind the dash area. Could this be the item I need to stop this? Thanks!