Since some time I own a Junker & Ruh nr. 22 it is similar as the SD28 but the base is more robust and has the oil reservoir integrated.
Working with the machine I was not content with the result! The presser foot left marks in the flat piece of leather and the under slide was too low and unstable to work with. So..... I made some adjustments / new parts.
Her a close-up of the old parts And here with the new (self made) parts
(closer to the machine and a bit rounded on the machine side)
The first under slide I made looked different and was straight and to thick!
Now the machine is satisfying and a pleasure to work with.
Here another close up of the old (standard) parts and my own creations!
I stitch all my Holsters with it or pre stitch for hand-sewing if its wanted.
I hope this Topic will help anyone who is working with the Junker & Ruh and who doesn't make shoes