That's not much fun Jim. OAG's can be very tricky to sort out. I spent the better part of a month to get mine sorted. What I found instructive was to get the guide camera in focus first before anything else. This is just to test that the prism is in the right depth and that there is no impediment to focus. Then you at least know what is going on there. Then measure this distance from an arbitary point and then get the main imager in focus. Once again measure that from the same point. This will give you an idea of how much extension you will need to get the guide camera in focus.
If you don't get it sorted in the next week I will try to come down and help you get it sorted. Once you have this sorted your flexure worries will be gone.
