Many guiding cameras are 1,25 and have c-mount screws.
If your off axis guider would have a c mount connection instead of a t2 it would be smaller and save some space and weight.
This may be good for dslrs or other stuff like Filter Wheels where the housing may not fit to the oag because it is prevented by this large t2 prism tower.
It should be relatively easy to produce. you may also offer several prism heads for the oag. one with t2 for asi 120 cameras and one with cmount for asi mini cameras..