Thanks, I tried my best with tools I got :D When I was tapping this spider I was considering 3/8-24 and 5/16-24 set screws, but I couldn't find any in my toolbox, but I had 3/8-16 and 5/16-18 set screws, so I picked 3/8-16 tap, so at this point I could tap it to 7/16-20 or 1/2-20, but I rather...