OK Rob you got it - a fair swap for your very fine deflection analysis of my 24" tapered blank a while back. Which one of your scopes do you want analyzed? How bout that 43" megascope?

.... How far inside focus is your diagonal, and what diameter fully illuminated field?

I have initally assumed a 43" mirror radius of 344" (exactly f/4) and placed your diagonal 29" inside focus. For a 1" diameter fully illuminated FOV the diagonal is 8.25" x 11.668", in-plane offset 0.715", lateral offset 0.506" away from the focuser and toward the primary. Optical analysis next.

Mike