Just a tip.

I use rubber cement to keep the scales together while I drill the holes and do the finish sanding.

When shape sanding the scales is "almost done", I carefully open up the wedge end of the scales and mount the wedge using a 1/16 bolt(s) and nut.
I then finish sanding the scales and have the wedge end matching the wedge.

I then dismount the wedge and rub off the rubber cement and finish the scales.

I got the idea for rubber cement from Lynn in one of his posts.