My flange is a beer bottle caps thickness above the floor, so I used one wax ring. Yes I did feel compression and wiggled it gently down until the toilet touched the floor. Then I sat on it and wiggled around a bit, got some 30lb dumbells and sat on it again. Then hand tightened the nuts, and finished off with a wrench until the oval washers deflected slightly. Reconnect feed line to tank. Flush 3 or 4 times and check for leaks with tissue. That's my install process.