Pete Snell wrote:
Nice catch Jon!

The handle is to adjust belt tension. I have a unit very similar to
yours but with a different name on it. ;-)

To change speeds; loosen the two thumb screws at the back, this will
allow the motor to slide forward, loosening the belts on the pulleys.
Put your belt on the desired pulley steps, then turn the handle to
push the motor back, which tensions the belts. Tighten the
thumbscrews to lock it and you're ready to drill.

On a side note, if the drive seems noisy, replace the drivebelts
with some good quality ones. The belts that came with it are probably
kinda 'lumpy'. I also had to replace the chuck on mine, as it was
pretty wonky, but it's given me great service over the years.

Thanks Pete. I'll play around with that later today and see if I can go
through the speeds on it. I was too excited yesterday to trust myself to do
anything beyond a little cleaning.

Jon