Hey Dan, I decided to clean my Viper up today after hitting the strip 2 weeks ago. I was laying down along side the car and can honestly say the front sill stone guards really seem to help! A quick clean & wax and my sills were done. Then I went to the rear of the car... It took me about 10 minutes each side to remove the rubber,, and then a quick clean and wax. All is good for the time being, but a set of rear stone guards would've made things so much easier. At a glance, there does look to be a couple of screws back there that the guards could mount to(one in the fender well and a couple underneath near the diffuser), we just need someone to fab them up! It's about that time for my Viper to hibernate for a few months, so 3/4 months from now would be perfect timing! What do ya think?