We have a small office that has purchased 3 R750 APs. We want to run them unleashed but I don't want to have to turn dedicated controller mode on one of them. The docs say when you have 3 or more APs (specifically the R750 and R850) one of them must become the master and be in dedicated controller mode. Is this actually true? Can you run 3 or say 4 without a dedicated controller?