I've wanted a dial a tint system in my car windows for a while now. The laws around here suck. Anything that lets less than 50% light through is illegal on front windows. It would make the car look crappy to have 50 on front and 20 on back. I want to dial in 10 all around until a cop pulls me over. Then I just set it to 50% and wait for the confused look on his face.