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Well, got the gadget put together today, had to go to a hobby shop to find four very small replacement screws (2mm?) to hold the threaded 2" adaptor on the front of the DSI. I'm using a couple of steel washers under the screws to clip over the flange on the adaptor, and it's surprisingly sturdy.
I put it on the C8 top vixen rail tonight with an ADM adaptor, and achieved good focus on Canopus, which was about all I could see through the clouds. Smaller stars were coming and going, but not dependable enough to try and calibrate for guiding. Maybe later or tomorrow. Then some pics for others who may want to try it.
So far, all has turned out great. Not using a UV/IR filter yet, want to see some smaller stars in an A/B comparison first.
If all goes well, I think I'll follow AlexN's advice and go for "Elegant simplicity"; Leave the ADM SBS plate on the EQ6, but just mount one scope with the guider on the LHS, keeping the RHS for my USB hub, qHY supply, etc. This will make balancing far easier and probably remove the need for any top weights. It is easy to swap scopes on the LHS dovetail and if I do want to pop a second scope on, the saddle is always ready.
That's the theory at this stage, anyway. Once again, thanks to Peter_4059 for his invaluable assistance in doing the adaptor thread. Without that, the project would have been impossible.
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