I just watched the video manual for the Ultimate G in a prior thread and I'm confused. I thought the difference between them was the UG DE had the two speed switch and the Ultimate G did not. The video manual showed the two speed switch on the Ultimate G. What is the difference between these two models? I'm ashamed to say that I'm not up on the G series machines since I left Kirby before they were introduced. I have a G4, but I've never attempted to disassemble it, and am looking forward to unboxing my new to me Diamond edition when health permits.