Dust shoe for Stepcraft CNC with Kress

Dust shoe Kress 1050 FME-P

The Kress 1050 FME-P has the ER-16 Collet system and therefore the clamp nut has a diameter of 25mm instead of the 18mm on the normal Kress.

So, the old dust shoe I had is of no further use because there was not enough clearance in the dust shoe.

Now the challenge is to adapt the dust extraction shoe to the new parameters.
I want it to be a flexible solution for different spindles eq. different clamping nut sizes.

And this is the result of some drawing