I bought this nozzle to overhaul my 12 year old DC24 Blueprint. It is not the same as the white version of Blueprint, but it is compatible. My original head was damaged and the roller just rumbled into place. It took me about 90 seconds to switch heads. Simply remove the "C" clip, disconnect the old nozzle and reverse the process. For those who have owned older DC24 vacuums, there is no "reset" button on the side of the roller for this attachment, but you can still use the roller's start/stop…