Those levelers above for a drill are a pretty nice idea.
I use the Harbour Freight table for my leveling.
I have my F-14 at 7 degrees, Sorcerer at 6, and Demolition Man at 6.5.
To level I placed my level on the top and bottom of the playfield, and used my phone app to set the degrees. "Laser Level" on Android. Has worked well for me.