you are correct the base plate is a 1/4 inch thick...and once again you are correct...the carpet is a factor...never thought of that, thanks. Not sure I want to cut a big square out but I think that would most likely be enough. Yes, I have tried pushing down on it.

The seat is too wobbly if you don't thread. When properly seated (without plate) the butt seat doesn't even wiggle. I really appreciate your response(s). Thanks