Since I almost never use my antiques [lenses] at infinity, (they are usually approaching 1:1 for a portrait) I make my waterhouse stops to “known’s” like 1 inch or 30mm. Then I measure the distance from stop to ground glass and divide a whole number. ie. a stop is a 1 inch hole. I measure the bellows at 22″, I’m at f22. The bellows is stretched out to 32 inches, same lens same stop, f32. No other calcs needed. Reciprocity still needed sometimes of course, but none of the bellows factor gymnastics.
You can see Galli’s work at his Web site, tonopahpictures.0catch.com.
Thanks for the side trip over to Jim’s site.