I have a nice alder guitar body that when the tremelo cover is put on its about 1/8"-3/16" tall off the guitar body..I know lots of guitars come like that but this one really bothers me..I am thinking about getting a Rotozip saw/router and routing into the cavity to make the cover flush with the body. I think using a straight edge clamped onto the body will act like a table saw ripping fence so I cut nice and straight. .anyone here done this or similar work ? I have already recessed the back of guitar body neck heel so I don't need a neck plate. .any you info appreciated.