Hi Jase,
Thanks so much for your suggestions!
I will check out the well depth and also retake the flats at a lower ADU. But, in saying that, if I load a Trius photo into CCDStack over saturated stars register 64,000+ADU. And, dimmer stars are registering a correspondingly lower value. So (and I may not be understanding something) an average ADU of 35,000 in a flat ought not to be saturated.
I didn't subtract the bias 2X in the calibration.....
I'm unsure what it means to use an average bias of 100. I would think it less accurate than using an actual bias master. Perhaps I need to make adjustments in the camera Manager of CCDStack. Anyway, I'll play around with both.
Thanks again,
Peter
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