The broken hacksaw blade works quite well for opening up the slots for pined hinges.

Do not forget to heat some vasoline in a metal can and dip the hinge area into the melted vasoline. This keeps the epoxy out of the hinge joint.

If you are going to use Robart hinge points (also QUITE GOOD ), I strongly suggest getting their drilling guage for centering the holes and don't forget to inlet/recess each controll surface for the hinge joint.