I just took some measurements of a PRS at a local guitar shop. The guys at the store were really cool about it. Then I found a pic online that was pretty much headon and resized that pic to the propper height and width I got from my measurements. I seperated that pic into four sections (top left, top right, bot left, bot right) and printed out each sectioin and taped them back together. I then cut it out taped it onto a piece of plexi glass and cut out the plexiglass. I found the center line and started filling in the position of the cavities. I have a bunch of measurements from a prs if you want them.