[DonRotolo]

Thanks for that coolant info Scott. "Rancid in the tank" is a real eye-opener for me. Oh, and the dust shield is clear plastic, so seeing the cut isn't a problem.

DampRobot, 6 IPM is 1" in 10 seconds, or 0.1" per second. Just seems slow to me, but....

1. You're getting good results. Something must be right, eh?
2. What kind of depth of cut we talkin here? 0.1" or 1/2"? That matters...

Anyway, I keep looking at #1 above and concluding it's OK.