I have a mountain basement floor that is pretty unlevel. I'm wondering if it's possible to damage a playfield after I level a game. One of my machines was extremely unlevel when I brought it home and after leveling I noticed the glass is much tighter and the playfield has a squeak to it when I slide it in and out of the cabinet. Is this the result of the cabinet bending off square? The right front and back levelers required a bit of raising over the left side. Any suggestions to keep my machine level without damaging it in this situation?