It’s not crazy bad but I hate going back and forth. I have to change the calibration figure on my laptop, on the right side of the bench is a lexan directional plate that needs pulled out, flipped over, and reinstalled, on the left side I have to 1/4 turn a marine port window remove the office plate with four thumb nuts so I can flip the radius plate over. The reinstall the window and flip one toggle switch. The round knob controls two motors to creep up on 28 inches and then each switch flips on another motor. I run three motors around 300cfm- app 350 or so and 4-5 motors at 420 on my B1 heads.