Hi
I don't have an answer for you, but, I am about to 3D print something similar for an SCT (in order to check position of the secondary).
I'll put it on thingiverse over the weekend, and link here. Have a look, if you think it may help, let me know and I can print up another. Alternatively, talk to the 3D printing people elsewhere on the forum, they will do a better job, and possibly know a more suitable design.
Philip
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