While thumbing (mousing?) through Harbor Freight’s on line web site I ran across a 249 piece rotary tool accessory set for $25. This isn’t a sale price so you might want to wait until it goes on sale. The link is below. From what I see, it’s got the best selection and assortment for what we do. I just thought I’d pass it on.
http://ww2.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=93243