DonnieMarco

I was thinking of bolting the camera straight to the vixen and reversing the guide scope go underneath but unfortunately that left me with a clearance issue on rotation of the EQ mount, a  gear box coming into contact with the camera on the guide scope

It has been torture trying to arrive at a solution where I can use my DSLR with both 16-35mm and 70-200mm with a ZWO mini guide scope and colour camera for guiding. I finally arrived at the solution below that balances perfectly. I think it will take some care to properly align the lens with guide cam but do the more experienced users think this could work?

just waiting on my ZWO ASIAIR Pro now to get it working.