https://www.gabriel-stahlformenbau.d...e=1&referid=18

These guys make THE best servo arms around, tried loads during my 10 years of kit building for customers and these were better than anything out there, they do a threaded through horn which the link shows that might suit if you put a washer or plate on the other side and a nut or the twin peg glue in ones are rock solid.

The arms with a Y design are so strong and hold the control rod at both sides so never going to twist or snap.

Hope this helps, this is a little gem of company.

marcs