I paid nothing Mad, and it cost me my lunch break to go and fetch it!
The cyclone assembly changed on DC07's. I had a yellow and grey one that I gave to a work colleague who still loves it, and with about 8 t15's the whole thing came apart, rubber seals, everything.
My step-aunt asked me to sort her Purple and Silver one out, and it was all plastic-welded together, and as it wasn't mine I didn't want to get poking with the flat-blade. It had a clutch as well, which was a pain as it took twice as long to get into the motor to check it!