Originally Posted by swvalcon
Thats a old body guy trick. If you take your old grinder disks and cut them into a star shape one size smaller and use a smaller backup pad behind it. Not only do they grind better they don't run as hot. You use to be able to buy a bench top cutter that would cut them down that way.
Yeah, you're right, a star shape, not stop sign. We had the cutter but we usually just used tin snips to cut the disk and took a guess at it.