Quote Originally Posted by bog View Post
Another good tip on top of what HereIsJT said, is to get some solid wood about 15mm thick about roughly the size of the bridge. I used some 80mm wide hardwood decking cut into 50mm strips. Practice drilling the string and bridge mounting holes on it. When you've got it perfect, do it a second time and glue the two pieces on top of each other with the holes perfectly aligned. You've now got a drill guide that you can use to get the holes right and help keep the drill bit vertical.
That's a bit brilliant.