You have a bit of a problem, no doubt about that, I have just completed a week of testing an LPI with GuideDog and K3CCDTools 3 against the ST-4 I have. The gist of the results were that the LPI needed fairly bright stars in GuideDog abd in K3CCD it would track on alot fainter stars. The ST-4, well old technology but beat the pants off the LPI.
Maybe K3CCD is the answer, only thing I din't like was it's performance on bright stars, very eratic.
JohnG
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