[labdude]

Sink was stainless steel. Neve rany corrosion.

Here's a little more info......

The first trimmer modified to 2 hp, was also stepped up to 3600 rpm. Increased the torque, thing was almost impossible to stall, but not quite.

That set up above was 2 trimmers at 2 hp.

We had single trimmer (10") 1/3 hp. with the finest carborundum wheel we could find. We further smoothed this with a stone used for sharpening knifes. We would run the trimmer, push the stone HARD against the wheel. This would prep it for use and didn't have to be done after the first few days. Wheel would last for a couple of years doing 100 cases a day. Any time a little particle stuck up and made a mark in the model surface, we only had to lightly touch the wheel with stone to remove it.
This trimmer was dedicated only to removing the very deep marks left by the modified trimmers and the extra coarse wheels they used.