The Tri Bhatinov masks you find on printables and thingiverse all have an issue with the Power/Sensor cable that is attached to the Celestron Dewheater.

So I have created a version specific to this combination that has an extra opening for the cables.

Here's the STL for the mask: triba.stl

and here's the Fusion360 link: https://a360.co/3Hs8lZQ

Here's a picture with the mask attached. Please note that the hole for the central mirror is perfectly centered in the mask, it is the mirror of my EdgeHD that is not centered:
IMG_0062.jpg
Edited ...
Like