I love my Bader B3, but forget the one posted by "Mark" in the tailgate... I tried to buy it,, sent Emails, Phone calls, etc, etc... but the person that posted it wont return calls, emails, or anything, I think its just a GIT, not intending to sell aything only collect our info, Buyer beware. He has posted those add's on other places, and I heard its the same problem there.
the cotee can NOT change contact wheels, they are one wheel only. so get the diameter you want.
I bet it would be great to have a row of grinders set up with various grits and diameters all ready to go.... :D