I had to grind about 1/4" of the length off of the brass screws John provided me with when I first tried to mount one of his adjustable bridges on my first Bernie Marsden.
The brass screws were just too long and bottomed out against the wood in the bottom of the hole before I could get the action low enough.
John said he'd never seen that before and I believe him because I have four other Bernie Marsdens that I had zero problems using those same type screws with.
Just call John and work it out.