Handle set for Allen keys and a dovetail mount. Tolerances are .15mm for the handles and Allen key mount. The dovetail uses .5mm tolerances.

Match up the Allen key size to the tagged handle, slide in the key, side in the stopper with a dab of glue and your done. Some sizes may need some hammered to get the key seated into the handle. Tolerances are .15mm throughout the design. The slides are tapered and may also need some percussive persuasion to seat. I used CA glue to ensure the key stays in place.