I'm curious if anyone is using "drift by" to maintain temperature in their C-41 film processing -- as opposed to using a water bath or some more elaborate set up (e.g. fish tank heater, slow cooker, etc.). Likewise, I'm curious if anyone is avoiding it for practical reasons. I'm looking for ways to simplify my C-41 processing. I'm NOT interested in tips on maintaining temperature, as I have that down already with a water bath -- but if it's not buying me anything that I can't easily fix when I print, then I'm willing to experiment with doing away with it altogether. (I don't mean to be belligerent, but I don't want the thread to evolve into yet another discussion on how to maintain temperature. I'm interested in this method specifically.) I use a plastic Paterson tank with two tempered prewashes (at about 105F). If the developer goes in at 102F, after three-plus minutes it's dropped to about 98F. I believe PE calls this "temperature averaging," and he and others make reference to Kodak documentation on this (though I can't find the actual source). If that's not an outright endorsement, it's enough for me to consider it seriously. But I'd like to hear about some practical experiences first. Thanks.