Fair enough, if Dyson will do the hard work for you, I can't argue with that!
I think you can leave the yolk assembly on (the bit the brushroll clicks on to) and remove the motor, theres a screw under the panel held on with 3 screws on one side, and a screw hiding under the square hose on the other side. Unplug the big white connector and clip the ball out. It'll still be held in with a very thin wire, but should be off enough to get at the screw.
Dont think there's any way round that, I imagine with use the black part will just ping off and get lodged somewhere!