We are adding a tire cleaner setup to our bays. southeastern Wisconsin so it gets cold. Mostly looking for advice on the bay setup. Thinking of doing a 25' coil tube coming off center of bay wall, no boom. Should the coil tube to handle be 1/4" or 3/8"? Thought about going into a gun then foam brush handle then the round tire brush. Thinking the gun so they can spray tire then scrub. But then thinking with the cold and freezing that this may not work. So may just need to skip the gun and go straight thru handle to tire brush? Thanks for the input.