software

So I bought a used jackson kelly a while ago with a broken strap post screw.

I've been trying to figure out the best way to go about repairing this. Should I try to remove the old screw/drill into it, or drill a new hole right beside it?

I'm installing a schaller strap lock in its place.

I 'd get the old screw out and then fill the hole with some toothpicks and wood glue. Let stand overnight...rub some bar soap around the threads of the new screw before putting it in.

SLyfox has it right. If you have to drill out the broken screw toothpicks may not work. You may have to use a small dowel to fill the hole you drilled. Be careful and take your time. Use a drill that has a low speed it is easier to control.