About as hard as you'd pound a picture hangar into sheetrock... I was afraid to hit the AC? lines located just above it...

I will probably just R&R the heater valve...

Thanks.

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Current Vehicles:
2006 BMW X5 4.4i, Premium, Sport, Cold Weather, Rear Climate, Rear Heated Seats, PanoRoof, Air Suspension, Comfort Seats, Nav, Alpine White with Light Poplar and Truffle Brown Interior

2007 BMW 335i Coupe, Premium, Sport, Cold Weather, Space Grey With Dark Burlwood & Black Leather