My grinder usage is primarily of a "blacksmith" nature, so what I do is use TWO DIFFERENT GRINDERS, a 7"Makita and a 5"Milwaukee. Both have a 5/8" threaded spindle. That way, I can use the cast-off discs from the big grinder in the small grinder. I even keep an eye out for piles of used discs in metal shops that I visit and bag as many of them for free as I can. I use those discs in the 5" Milwaukee. I also have a Ryobi that has the smaller threaded spindle that I use for reeely precise work. I also have some sanding disc setups but rarely use one. [img]/forums/images/icons/wink.gif[/img] [img]/forums/images/icons/smile.gif[/img]