When I said wobble, I was meaning at the points where the hose connects to the tube, and where the two tubes meet where they slide out of each other, and where it meets the floor tool. I've seen a DC32 in action in a large electrical store, and that was where I realised I was not a bit keen on the new tubes. The use of generic parts is a judgement call. I ran a small back street repair shop, with no loyalty or affiliation to any brand. I would often prefer to sell genuine belts as these were more likely to give better service than the non genuine. For bags and filters it was a matter of who was supplying what. I would look at the quality and decide what was the most cost effective item to stock. The type of people who come to a small shop like mine do not want to spend a lot, they just want the cleaner working.
For tools and accessories, it was generic all the way for me.The quality was usually on a par with genuine parts, and sometimes even exceeded it. The woman I mentioned with her DC08 would have spent something like £250 on it a number of years before she came to me wanting parts for it. I remember looking up the parts and to get them & sell them to her would have cost more than double what I charged her for a brand new generic black tool kit, which included all new small tools as well. I gave her the choice. She took it and did in fact come back at one point to say she liked the kit. To some people a vacuum cleaner is just that. There to do a job I suppose.