I recently helped someone with his SP-15. One of his problems was that one of the roller height adjustment knobs had broken due to an impact. His press had knobs of solid plastic, sort of pear-shaped with a tapered stem.
I just purchased a Vandercook 099 Proofpress (https://vandercookpress.info/vanderblog/timeline/2/#099). It is in great working condition and has been well taken care of. I have experience with a Vandercook press but not this one. I have to ink the plate by hand
Here are a couple of photos of my Hacker Poco 0 with my tympan and frisket. I hand ink this press. Notice the roller bearers. This process approximates the printing techniques used on the Common Press for 350 years, and