Listers, My heater valve sprung a leak (ironically, when it's in the 'off' position). I've replaced it before, and remember it being a real PITA (underdash work is my least favorite). Anyone have some tips or workarounds? I have a radio, so it's gotta come out--not a big deal--but do I have to pull the gearbox cover (a bit bigger deal)? TIA, Bob