We have been using equipment made for this purpose by IS (same people that
make the pumice scrubbers).  Overall, we consider it a good machine.  Really
caked in router dust, e.g. in break-aways, still needs some personal
attention. .010" won't make it through ours without help, although we rarely
have need to; not sure about .220". Feel free to call or email through
technet if you would like more info.

Lyle Anderson
Lundahl Astro Circuits
801-755-0349