Side Clamps to make jig
Side clamps start with raw block of metal too, then squared. Fast forward to holes cut, threaded and slits cut.
After cleaning and quality time with files to remove sharp edges. Bluing applied to make the new tools 'look professional' and prevent rust.
A side clamp in place against the label jig. The recessed cap screw on the top draws the T-nut up tight keeping the side clamp for sliding. (Part of the T-nuts can be seen in the red T-slots.) The two set screws on the side, press against flexible side clamping the part being held.
With two side clamps, the part/material being worked on is held in place.
With the side clamps completed, back to making the jig.