Took me a bit to work it out and a few small bearings on the slider got things working, had to make the small sprocket to get the right ratio and now its working a treat. Will have go at doing a few .45 black powder barrels with a 1-48 twist and give them a good lapping to get things smooth.
, using my toolpost grinder head to hold the R/rod.
, A closer look.
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