Thanks for embedding the pictures.
I couldn't find a small enough nylon pellet or rod so the nylon screw was the easiest way. I thought about grinding down the taper on the thumb screws but it isn't deeded.
Thanks
Mark

Here are some pictures to show you how to protect the threads on your micro angle adjustment ball joint.
Get a nylon screw. I used an 8-32 from Lowes for 56cents. I know it is a smaller thread size but it will work easier.
Use a dremel to cut a small notch in the end (pictures 1&2). Then cut off the end at about .140 or 3.5 mm ( pictures 3&4 ). Repeat the process to make 2 small nylon screws. Thread your new screws into the micro adjustment lock threads of the L-bracket until they stop ( picture 5 ). Then replace the 10-32 thumb lock screw and tighten down ( picture 6). This will protect the threads from getting damaged by the 2 screws jamming together. You may have to tighten it pretty tight the first couple of times until the new nylon threads compress but after that it works great and there will be no thread damage.
I also got some 5/16 self adhesive car door protector to put on the edge of my base to protect the arms and base from damage see (picture 7).
I hope this helps some of you.

Mark