Adapter from vertical drill jig to dremel flex shaft

First place the flex hose into the part, then put into the press mounting bracket so that the slits align (see the photo).

Print with small layer height and slightly higher temperature for best layer adhesion.
I did mine with 0.2 mm and 200℃

Existing dimensions:
Drill Press Mount internal diameter: 42.8mm (standard)
Flexi-Hose external diameter: 19.8mm

Dimensions can be eddited with OnShape:
https://cad.onshape.com/documents/8cc37c95717ca2d4e06278d1/w/471d0e44134d380b0ef026c3/e/d810bc172720bf6e2ee85273?renderMode=0&uiState=67f82ef7f43e8016cb2a34ae