I'm hoping one of you help me figure this out. Is it true that the most current Rainbow canister model (the one with the re-designed power nozzle)has the same canister unit as one or two of the previous models? I'm looking to buy used and I was really really impressed with the high suction and the low noise level of their most current machine. I'm trying to determine if the motor in this canister is also the same as in the models also referred to as the 'Type 12', the 'Platinum' and the 'Blue'? I hope some of you Rainbow people can help me with this. I'd greatly appreciate hearing from anyone who knows.