To answer the earlier question as to whether the Hamilton Beach designed power nozzle was a modifiedupright design, I would say the answer is yes. I believe it is a modified Hamilton Beach model 470 from the 1960s. I have not seen this model personally, but I do know it was tested by Consumer Reports in 1964, and was relegated to the bottom of the ratings of the acceptable, fully tested uprights (reason being that its rug-cleaning performance, while not as good as any of the other fully tested models, was still considerably better than any of the straight-suction canisters. Back then, an upright first had to outperform all straight-suction cleaners in order to qualify for the full battery of performance and convenience tests.)