Rob,
I have tried a couple of differing OAG's, and never really hit the spot with them. I have a separate guide-scope, a nice 500mm focal length 65mm apo, but the length is bordering on unwieldy.
So, without trying to throw you completely off the mark, I have of late been using a converted 50mm finder, with my guide camera (in my case an SX Guide-head) fitted in the place of the cross-hair eyepiece.
Small, light, and zillions of guide-stars.
So far it has provided effortless guiding with the FLT132, and also the M703 (reduced, so about 1350mm).
There have been a few threads on this "alternative", so maybe give that a thought as well. I am currently coercing a supplier to provide this "Guide/Finder" as a commercial item.
Gary
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