When the "Turbine Pet Hair Attachment Tool" of my Dyson DC14 failed, I ordered the newer model (Tangle-Free Turbine Tool) directly from Dyson.

Unfortunately it doesn't fit. And there's not adapter available for my DC14 as it's an antique/out-of-stock.

Sounds like a chance to design & print something to me!!

I started from peaberry's excellent Modular Accessory Rack and added the DC14 compatible fitting.

It works with both the "male" (extension) connector and "female" (hose) connector.

For a spring, I racked my brain, until inspiration struck in the shower - I scavenged the sprint from a pump-top shampoo bottle... cutting it with wire cutters to achieve the correct tension (button travel is about 0.5mm - so you don't need much spring)

Added v2 buttons - with more strength on the pivot (and single-sided insertion... the first one broke as I installed the spring - right at the layer line.

Added .STEP files for both parts (whoops!)