CTC Cooling Duct spring clip mounts

I love thruit00's Active Cooling Fan Duct v2, but only want it on my printer when I'm going to use it! (It obscures the view, and I like to keep an eye on what's going on!)

So I originally mounted his active cooling duct with longer (20mm) screws and springs so I could easily remove it. But I found that the little clips were a bit difficult to get a grip on with my big hands and fat fingers, plus the clips wobbled around a bit with the springs.

So I designed and printed these Spring C