I'm using pull-pulls on my latest project for the elevator and rudder. The fuselage is not wide enough to use a servo horn wide enough to create a parallelagram. Therefore I am using an intermediate bellcrank for both controls arranged on a piece of music wire. The elevator cables will turn 90 degrees before exiting the fuselage.

The only thing I have a question about is the bellcrank material. I'm at the point now where I need to install them and don't want to wait for an order through the mail.

I have two choices - aircraft ply or fiberglass pc board. My concern is that the PC board may cut through the cables. I made the bellcranks already and radiused the edges. I'm just not confident in it.

Has anyone ever done this? If so, how did it hold up? Also, suggestions for other materials to make the bellcranks from are welcome.