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Yeah I may end up going back to an OAG.
I've used a couple of OAGs. One was the Orion Deluxe, which was junk. The other was the TS 27 which was much better (but came with nothing, unlike the Orion which came with a bunch of spacers, making life much more simple).
When I was using OAG it was with the RC8, which was slow and had a decent focal length. I found it difficult to find stars sometimes. The other thing was that I found PHD seemed to guide better on round stars than on the misshapen ones you get with an OAG. Honestly don't know how much merit there was to that, but that's what it seemed like.
I only bought an OAG originally because I got the RC8 and everyone seemed to say that once you hit 1.5m of FL, OAG is the way to go, but below that a guidescope is easier. So when I went down to 900mm, a guidescope seemed like a good option, and I've had no problems since doing that.
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