I'm almost ready to route out the control cavity of my first ever home made bass. Originally I didn't plan to make a matching cover, but I just saw some pictures of basses with those kind of cover and it motivated my to try making one myself. The problem is, after some doing some thinking about the process, I realized I'm too dumb to figure out a way to do it. Can someone here share some insight as do how to get it started and how to make it as tight as possible? My body is a one piece solid ash with no laminted top. Thanks for any help guys!