Quoted from eyeamred2u:
I know the shim is not the best approach, it it has held up quite well on my game.
With the droop and twist, it took a combined approach to get it perfect. The shim really helped.
When I got the game the back panel of the playfield dragged on the wall so bad It made a gouge.
Also the cabinet was out of square 3/8"
It took a bit or clamping, gluing and nailing to firm it up and fix it.
Pony clamps and diagonal pressure from ratchet straps worked really well after cracking everything loose with a heavy rubber mallet.
Now its smooth and perfect.
The playfield is level enough for gameplay. It's actually s little better than my NIB games lol.
Slight bend at the pops but it's only the pop area and wont affect gameplay at all.