OK, so I spent about an half hour at the dealer yesterday trying to figure this out. I bought the workshop cleaning set which has the 36mm hose, I want to leave the 36mm hose attached to the CT normally for floor cleaning, and stuff, but then I want the option to connect the 27mm hose (CT end) to the tool end of the 36mm then attach the 27mm to whichever tool I am using, like normal. Is this making sense?? We had a hard time coming up with the right piece, we finally did (#452 897), but is seems less than Fes-perfect to me. Has anyone else run into this? I have found when I struggle with Festool stuff, I am doing it wrong!