This is a bracket I made for mounting an adjustable desk top positioner to my drafting table. Besides being pretty, it keeps the positioner rod from hitting the lip of my table.

Unfortunately, I misplaced the nice brass screws before I got my brackets painted like brass. For now, I had to hold it in place while taking the photo.

Both files are in inches. You will probably need to scale it up by 25.4 to be the proper size for printing.

Bolt the bracket to your drafting table, bolt the positioner to the bracket and table, and enjoy. If you don't have the required hardware, just enjoy the photo. ;) Maybe you can adapt for other purposes.