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John, the phd method bums out if your guiders F/L is over maybe 800mm. Changes you make zoom off the chart and you can't tell which way it went. In the dome I normally start with under 600mm then push F/L up to the highest I use to get it accurate. It can sometimes take 3 nights though to get it set, depends on seeing at the longer F/L. It's worth the time in the long run and I only do it if I've pulled the mount out.
If you use dx/dy charts that's straight from the camera with no adjustment for angle. We spoke to stark about it and you really need to use the normal charts and turn all guiding off and ignore RA.
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