Thanks! I've been using autofocus with Hyperstar and it has performed really well. I'm getting nice tight stars. I'm still on the learning curve as I've only been using SGP for about a week or so but it is extremely intuitive and by far the best all round programme that I've used.
I have had to play with the autofocus settings a bit as it is really easy to over saturate the focus stars. For a non-autofocus I would normally have to find an @mag 10 star. With the SGP whole field autofocus it seems to pick appropriate, unsaturated, stars and is not affected by stars that would normally make focusing with Hyperstar difficult at best.
My settings are, I believe, 1s at ISO 800. I am looking at experimenting with backlash tonight but so far haven't seen an issue that is readily apparent. BTW, I'm using the Starizona MicroTouch focuser which replaces the C11 focuser so backlash could/should exist but SGP focusing seems to handle it well. I'll know more after tonight.
I'm not sure how many Hyperstar users you have but if I can be of any help or if you'd like to set up an Hyperstar discussion section I'd be more than happy to help/ contribute as I am able.