This is what I was thinking as well. I suspect Kray has this problem pegged in a blending issue more than anything else. So far my AC is sufficient for me, even in 90 degree temps here, but I will remember this thread if I decide I'd like it colder, as I agree that the vent temps do not feel as cold as other vehicles I have owned.The big temp drop should be through the phase change as the compressed liquid freon is converted to a gas at the expansion valve before the evaporator coil. Once the expanded gas has left the evaporator and is headed back to the compressor (as in the photo above), it wouldn't need any insulation. You won't receive any benefit.