Todd
I just noticed your graph shows a saturated guide star with SNR of 86 which is not ideal for Guiding
Try an exposure setting of 2 sec
Once looping , go to tools and let PHD2 “auto select a star” for you which will be unsaturated and have a SNR value between say 15 and 40 depending on your star field and seeing conditions. Don’t be concerned the guide star that is auto selected is not in the centre of your FOV , as long as it’s not close to the edges
This may help ?
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