Drill and Tap Guide to put set screw in Lee Reloading Die Lock Nuts

Most of us dislike the spongy feel of the locking nuts with O rings for Lee dies and the less than secure grip they provide. This is a simple jig for adding an 8-32 brass set screw to the lock nut and replacing the O ring with a plastic spacer to bear on the reloading press. This provides a positive lock when the dies are inserted. Here's the sequence of the build. Remove the O ring from the lock nut and screw it onto any die and put it in your press. Screw the lock nut down till it touches the press and mark the corner you want to use for the set screw. Pick a corner facing forward or to one side. The lock nut will always return to this place. Print two copies of the drilling jig. Printing never yields the proper sized hole, so drill the guide hole in the first jig with a 9/64" drill bit. This will be the one you use for drilling the hole. Drill the guide hole in the second jig with an 11/64" drill bit. This one will be the guide to get the 8-32 tap going straight. Clamp the hex nut, marked point up toward the guide in a drill press vise for drilling. If you only have a hand held drill, clamp it between two pieces of wood and drill a #29 wire drill or 9/64" hole in the lock nut. Move the lock nut to the tapping guide fixture and using an 8-32 tap, thread the hole. Next print one or more spacers to replace the O ring. Ideally the spacer with be a press fit in the lock nut. I did epoxy several loose fitting ones in, but despite only putting dabs of glue around the periphery a little epoxy squeezed out and it was something else to deal with. I had trouble getting my printer to print spacers of the diameter specified in my sketch; they came out undersized despite printing layers at 0.1 mm thickness. I worked around this by having Prusa slicer make the objects 100.5% and 101% larger. I could not press these into the lock nut with my fingers. The way to seat these is to screw the lock nut on a die and put the spacer beneath it, then screw this into your press. Screw the lock nut down onto the spacer by hand and then seat it in the nut by using a wrench to tighten the nut. I have converted 15 to 20 lock nuts so far. This is my first contribution to Thingiverse and it took many prints to get this right. The files I uploaded worked in my Prusa Core One printer. I don't know enough to help you if you think there should be dimensional changes. Some of these screwed onto the dies a little tightly at first. Screwing them on and off a couple of times helped to loosen things up. Putting it on the die and screwing the lock nut down tight on the press helped to loosen these up. I printed these in PLA from Overture on a Prusa Core One printer.