Anyone out there have a manual for a Kuhlmann GM 1-1 pantograph? I have most of the operation figured out but one part isn't making sense. The lever on the side of the spindle lowers and raises the spindle by probably 1/4" or so when thrown. The ring that the lever is part of lowers the spindle a much smaller amount when rotated. It seems like the ring above it with the scale should rotate with it, but it doesn't. Sorry about the sideways pics.