Just received this morning the Redcat special prism diagonal and the Canon Wide camera flange.
It now covers imaging (CCD/CMOS), visual as well as being VERY suitable as a manual lens for the DSLR.
Looking through it with the diagonal was a joy - VERY flat field, beautiful image and extremely sharp.
Only not so fun thing is balancing it on a stiff mount - not too difficult in Dec (not much moment arm to move anyway), but a real pain in RA as it is SO light. I don't think the mount will care much anyway