If you use a print drum and a roller base to process sheet film, how do you keep the developer temp. consistent ?
Temperature control when processing in a tube has never been a problem for me. The plastic from which the tubes are made does not transfer heat very effectively therefore the temperature of the solutions vary very little if at all.
Ditto, but I am less of a stickler for temperature consistency than most.
Unless the room temperature is at a extreme to 20degC there is not much change over the development time