Nice Paul, what a sweetheart!
First the simple - you have to adjust both sides equally - in case you just tried to lower one side.
Beyond that you may or may not have something else going on with your bridge, neck or body. Have a luthier or at least someone with DB experience look at it before you start cutting on anything.
It is hard to comment specifically without seeing it. If you could post some pictures (bridge, neck, body several angles), you might get better advice here on TB.
If what you need done is just some leg height taken off at the adjuster surface it should not be a big deal ($). However there are a few DYI risks - like the adjust screws bottoming out in the threaded hole or hitting the body because of reduced clearance. Also your sound post could fall while the pressure is off it.