Andy,
Thats an interesting one, I don't have that particular machine but looking at the photo, could you not reverse the order of the gears on each stud starting from the top to bring the large gear to the end of the lead screw, you would then have room to fit a small gear behind as a spacer (or indeed if you have a spacer – the spacer). Shouldn't change the overall ratio, just the relative positions of the gears if you get my drift?
Paul.
Doh, cancel the above! Looks like the position of the first gear on the mandrel is fixed and would need the pulley etc removing! Also it wouldn't change to relative clearance at the bottom. Sorry.
Edited By Paul Kemp on 07/06/2020 12:59:24
Edited By Paul Kemp on 07/06/2020 13:02:15