So, I was talking to our local Aerus rep, the one I bought my Aerus classic from and asked if he had anything used he might want to part with. While the Aerus classic is a great vacuum, I love the sound of the two stage motors that were used in some of the previous models. Turns out he had a model called the Electrolux Advantage, I'm not sure when it was popular, but he said it has a brand new Lamb motor in it. As far as I know, all of the Lamb motors are made by Ametek. It sounded great, a nice two stage motor sound and he offered me a good price, so I got it, and I'm glad I did, it's an awesome machine. I'm just wondering if they ever used these motors, or if he retrofitted an Ametek motor in to it. Either way, it works great, and is quite powerful. He told me something else that I did not know. Apparently the current Aerus classic motors do not use brushes, they are brushless motors. Kind of makes you wonder why more motors are not made that way.