Glen, I reviewed the model, and confirmed that I did in fact use a Brunswick Superspeed K55 cushion. I also added some dimensions for clarification.
23.5 degrees is the correct angle for 1 29/64" nose height, whereas 22.5 degrees sets it at 1 7/16".
First off, if your measurements were taken from a GC1 rail, then the sub-rail would have been milled for the K55 Monarch Superspeed cushions which were 1 1/8" wide along with a 7/8" wide sub-rail cap for a total width of 2" from the formica to the nose of the cushion, and the bevel would have been 23.5 degree down angle. In your drawing you're saying you drew it out for a 1 1/4" wide superspeed cushion, but if that be the case, the distance from the formica to the nose of the cushion should have ended up being 2 1/8" wide, and because the newer superspeed cushions have a wider back for gluing the cushions to the sub-rails, your drawing should have shown the bottom of the cushion overhanging the backward angle st the bottom of the sub-rail because the newer K55 superspeed cushions are an 1/8" wider across the back gluing area than the K55 monarch superspeed cushions. And its been my experience that 1 degree down angle difference causes way more change to the nose height than 1/64"th of an inch.
And yes, his 760 is on upside down, the weave grain is more dominant in rows and fuzzy, vs the finish side of the 760 in which the weave grain is more meshed together and less visible in rows. When he starts seeing little knot balls forming on the cloth in areas, if they haven't appeared already, that only happens on the back side of the cloth if its exposed to wear.