10
Start by finding a flat level surface (you can use the spirit level to check for this). Insert the spirit level
into the scanner cover as shown. Then put the scanner cover on the flat level surface. Next use your
fingers or a small tool like a screw driver to adjust the position of the spirit level in the hole until the
bubble sits in the center when the scanner cover is sitting flat on the level table.
Put a few beads of glue around the spirit level and let it dry in a level position.