This is simple little adapter for the back of the Mak to turn it from unusual M44.5 to more standard M48.
Made it to be able to put my Astro Physics CCDT67 as close as possible to the hole.
I printed it without supports, did get a bit of stringing but easy to pull out. Printed in PETG, and in my case fits perfectly.
Update: I have created male to male version as well.
If you need it to be T2 (m42 female) you can print this simple model as well:
https://www.thingiverse.com/thing:5989680
The author marked this model as their own original creation.