The OAG that you linked looks interesting indeed. I did not advise what telescope that I would be using when I ordered so it is already in the mail. I suspect that using my Qhy9 with this and a SSAG would cause problems with the OAG being so close to the filter wheel. It would only work in one position. I went with the 2.5 inch OAG to put it in front of my current corrector.
At the moment the camera comes into focus around 10 mm to close to the focuser to fit the OAG before the corrector, so what im going to do is move the mirror up the tube a bit. It should work fine as the larger apeture focuser secondary and OAG should accomodate the light cone.
I will let you know how I go, and no doubt post some images. Most of all im looking forward to having no problems with differential flexture!
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