. I have a super 7 with std gears( no gear box ) and wanted to reduce the feed rate from the lowest on the chart ( .0043 ) to something a lot lower. There is an option for a 12 tooth cluster( optional extra on new machine ) but my efforts to locate one have been fruitless. My question therefore is what additional gears obtainable for eg off ebay, RDG etc ( 80,75,90,etc ) from those available to me now will give me a reduced feed rate. And having got them-will they fit in the banjo ?