That's the small thing that makes it. Today I made a holder to the temperature probe I use to my motor focuser. I didn't attach it direct to the lens but to the dovetail. Normally I stripe small devices in place, but why not make a 3D-printed holder ?
Find here how it looks:
http://www.astrofriend.eu/3d-printin...or-holder.html
I have uploaded the STL file if someone find it interesting to 3D-print it.
All my STL files on the 3D-prining main menu:
http://www.astrofriend.eu/3d-printing/3dprinting.html
Note: my STL files can maybe have errors, but they work on my AnyCube delta printer with the Cura slicer.
/Lars