What is the difference and how do you tell if a feedhorn is a Corotor or a Corotor II or a Corotor II Plus??? I picked up a BUD with a Chaparral C/Ku band feedhorn and I do not know how to tell for sure which one it is. It says Chaparral and I could not find any other info on it. This one and the other 2 identical ones that I have to pick up are all Unimesh 7.5 foot BUDS which I think came from the same dealer. All other BUDs that I found are just C band but most still have nice actuator$!!!