Looks fascinating bojan !
I'd say for sure this works with a prism assembly as I recall seeing one here at work when we had a Science Department and recall ''prisms''being mentioned.
Of course I wanted to borrow it to try on my 6 inch reflefctor at the time but they guarded it with all the kings men!!!
I would love to see if it works on your scope..........even a make shift arrangement will do
Rob.