gpu cc distances

F =  600  = 51.66mm (52)
F =  800  = 53.66mm (54)
F = 1000  = 55.00mm (55)
F = 1200  = 54.66mm (55)
F > 1500  = 54.60mm (55)

eos flange to sensor = 44mm

m48 t adaptors in 1mm, 10mm and 11mm thickness