Maybe only need a distance ring between. I don't think it's possible to 3D-print that thin device, will only be 0.6 mm thick. Maybe better to use some plastic film instead. Or is it just to tight the clamp harder ?
I have put up the STL file for download if you want to try. I can only test it on EQ6 and HEQ5 mounts and I don't had any clear sky yet.
Here you find the STL file:
http://www.astrofriend.eu/3d-printing/3dprinting.html
Let me know if it's possible to solve for the Star Adventurer mount.
Lars