Hi AM, I own a few older CC45's that are installed in small cafes doing low kg's per week. I'm note entirely sure, but I suspect the CC and RR would share some components. One of my cafe customers had this strange thing about wanting to ensure all beans from a bag were completely ground before filling with a new bag. The weirdest thing I've ever come across in a cafe environment - she would remove the hopper, turn the grinder upside down (yes, I'm not joking, she had muscles - a Russian woman) and tip anything out.........all because she did not have a little vacuum or brush. You can see where this is heading........after a couple of months, the sensor sitting on top of the doser (which looks like a cigarette butt), near the adjustment collar broke. I replaced it not knowing what caused it because she did not tell me how it was broken - I just assumed faulty components. After the second time, I tried to disable the sensor because the magnet in the hopper was also going missing from time to time. Then I found out about her doing the inverse routine - not very happy. On the CC45's, the sensor expects a magnet which is sized somewhere between a large golf ball and a small tennis ball, to be sitting in a 3-star plastic holder inside the hopper. It's must be important RE: the strength and size of the magnet and the sensor as I tried a few other combinations with limited success - occasional cutouts, until I begrudgingly bought the correct parts - then no further problems. Unfortunately, I did'nt spend enough time trying to work out how to bridge out the sensor - grinder failures tend to cause panic at the time!