I wanted a dust shoe that could have its height set independently of the Z movement so I came up with this.

Video of it in action: https://www.youtube.com/watch?v=Cq3LlhZMwkM

In the STEP file are two options for the shoe. One is 3D Printed, the other can be machined on the PrintNC. The printed shoe needs a machine with a 300mm bed size so I recommend going for the machined version. You can use 10mm perspex.

To complete you will need the following stuff:

For the 3D Printed version:

2 x 8mm smooth rod approximately 150mm in length
16 x M4 x 20mm bolts
10 x M4 nyloc nuts
1 x Dust booth brush
4 x LM8UU bearings
12 x 8mm x 1mm magnets

For the machined version:

2 x 8mm smooth rod approximately 150mm in length
16 x M4 x 20mm bolts
10 x M4 nyloc nuts
1 x Dust booth brush
4 x LM8UU bearings
12 x 8mm x 2mm magnets