Yeah, that's about what it took for my heater install. I drilled four 4" holes for the HotTubes, 2 in the walk-thru area and 2 comming out under the seats. I had to up my wifes prozac intake to get her through it!!!

All was fine though.

I'm certainally going to add this flip up light to my winter project list. Thanks Razz... add another hundred to the value of my baby!