Though not as big as yours I mounted my Quincy on compressed rubber pads rated at 1,000 lbs. each. I just wanted a cushion against vibration movement and insulate noise. It worked well being in the open shop with the radio on, there is little noise w/ running and turned out quite acceptable. The wood pad is made out of 4x4's and free floating, non-attached to the floor with a thick piece of ply wood and it's been a couple of years now and it doesn't move around at all on the floor when running, and shows no movement of the compressor it's self mounted to the wood pad and HD rubber pads. Solid and steady, yet movable easily if needed.