I bought almost everything in the complete kit from Cleaveland so it includes the 6, 2 and 1" wheels. Trying test strips on the edges I found that trying to clean if perpendicular would chatter using the 6" wheel. Running edge on is ok but as you mention it would eventually cut a groove.
I'll try out one of the edge v-tools or http://www.aircraftspruce.ca/catalog...tools90095.php
It seems like the right approach, but I'll try to get the knack with the wheel and did find ok results with the vixen file.