My band thing came off and I couldn't get it back on again without it making that awful banging noise. I rang dyson (even though I had no idea where my receipt was and it was about 3 years old!) and someone tried to help me over the phone, I couldn't do it so they sent someone out and a very nice man put it back on for me. Was very easy to do though so I felt a bit stupid! Plus even more embarrasingly I had just finished a degree in engineering!
So don't worry even if you cant do it they will help you!
Yes! Yes! go to Dyson website uk (google it) and order spare parts. Free (I think) if vacuum still under warranty. This is what I did for mine & is like new. Still hate nasty green & purple colours, tho.