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Well yes I did find a solution for the refractor, which was to removed the 2" diagonal and go to the smaller 1.25" diagonal on a Televue Intravel adaptor (which has a recessed 1.25" hole allowing the EP or diagonal more intravel).
THe binoviewer also worked without the diagonal but that is hard on my neck and most people probably would not want to use it that way but for terrestial viewing it is a good solution.
Interestingly when I was researching refractors recently I found that the Stellarvue 110 has a removable rear extension section to allow binoviewers to achieve focus. With the refractor that I am planning to build over the coming months (based on an iStart objective) I will design it to allow the use of the binoviewer.
As far as the Dob is concerned, no I don't have a solution, I can't get the binoviewer to focus, even with the Televue adaptor. I can only see two possible solutions: one to move the primary mirror up in the rear to push the focal point further up the focuser (which potentially impacts EP focal points), or two, switch to a lower profile focuser (and this might also impact EPs FPs. There maybe other adaptors that work but I don't have them. As I said in the post with the link to the adaptors, there are other solutions on the market, including ones that screw directly into the front of the binoviewer, but I haven't investigated them fully.
For now I am regarding it as a viewer that works with my refractor and that's ok. I will keep it. I know there are binoviewers that work with dobs so its just a matter of time till I get around to it again.
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