I have a Chromega roller that only goes in one direction and it works really well with my 3010 drum. I develop in my basement and the temperature is reasonably constant, so I don't worry about temperature control. For black and white, it's less critical and you can always adjust development time a bit to compensate. With the Jobo tank and the motorized roller, developing 4x5 is even easier than developing roll film. When I was a kid developing color prints, I used to roll the print drums back and forth on a table and only dreamed of getting a swanky motorized roller.
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