Another day of testing should get me to the point where I can box up a set for Chris. Yesterday it got up to 48 C in the tower. This only because I have the program set to only cool the water to 10 C below ambient. I don't want everything dripping. This means we have been tested to pretty cold in winter and now pretty hot.
Nothing fails, or obviously drifts.
So far I have not measured any drift of the RA drive from temperature. I will have to take a reading on a warm day to get another data point for possible RA drive temperature compensation.