I did a "dry run" and noticed that with two prewashes at 105F, an ambient temperature of 70F, and NO tempering bath, that the temp only dropped two-and-a-half degrees. The water went in at 102F and came out at 99.5F. What I'll probably try next is a clip test just to satisfy my own curiosity. I'll shoot several frames of the same scene, and develop clips with and without the water bath.

I do make optical prints, and I do appreciate as little fuss as possible when it comes to filtering. What I might find is that drift is a better solution for people who only scan their negatives.