Thanks for sharing Hendreforgan, was just wondering why the owner did not just take off the belts and use the hand crank?? you don´t have both hands holding the work but at least you can still use your machine?? They are very nice machines and a gr8 solution for a small workshop, the small knob was probably for changing over with the large handle for when being used with the motor as it would be pretty dangerous that big handle sticking out and flying around. I have one here in the corner, hand crank and without pedestal, it is the slightly older model. I also have a PDF somewhere of the manual if anyone is interested by Gritzner in English and Frobana in German.
Frobana.pdf
Gritzner-Manual.pdf