Alum, on the RE website, they have in their razor archive a Gillette internal document that, IIRC, states the 1-3 settings of the 195 was supposed to mimic the SS Blue, 4-6 was the standard SS, and 7-9 was the Red Tip.Hi @StewB
Just a couple of thoughts. I understand you are using your 195 at setting 9. I would suggest that using a 195, or any adjustable at maximum setting while getting used to it may not be the best approach. It is an adjustable after all, and a 1 setting approach may blind you as to the flexibility and potential of the razor.
As I have mentioned in a couple of threads, using blade gap measurements of the 195 and Slim and subsequent Gillette adjustables, (I have no evidence they were subsequently changed) the 195 up to setting 5 mimics the Gillette Super Speed trio, above setting 5 it is unclear what the designers were attempting, except to either compete with the blade gaps of the Merkur Progress, introduced in 1955, and/or to give Gillette consumers an unprecedentedly efficient shave. The 195 settings 6-9 were, and remained, the highest blade gaps on any Gillette.
I would suggest using the 195 initially at settings 6-4 (in 3 passes) I think you will get a better idea of the subtleties of the Gillette adjustable range at these gaps.
I find the 195 and Slim to be superb and smooth shavers, at these ranges. Also very efficient. 7-9 settings, I find puzzling as to why they were included, although as a more efficient setting regime, say 8-6, they make for an interesting shave.
It runs best with the Gillette Plat, an IP or a SuperMax Diamond Edge in my usage, though it seems to like most blades.
Have fun experimenting with this masterpiece of vintage mass production industrial design art!