But... But... But...
I can put that Graflex lens board where ever i want in relation to the film plane.
The Eddystone diecast boxes only cost $15 or so and are available in all sorts of dimensions
What about just using a 75mm achromatic doublet .. behind the Prontor and on a Crayford?
I have been reading up on geometric optics but not up to speed on how to calculate image circle
100% home brew, that is what I am aiming for.