> OK, on a side note. Since you apparently have this style sander
> grit do you prefer?
Think of this tool as an abrasive cutting, not a finishing device.
Haven't looked in a while, but think they are 50-60 grit disks.
Use PSA disks from Klingspor, which, BTW, is a total PITA unless you
use the tool at least weekly to keep the cement working.
Trying to mix two different grits on the same disk just seems like a
lot of work for little return.
No proof, just gut feel.