How important is it to have a non metallic pushrod? I bought a Dynaflight PT 19 w\31cc Ryobi Gas engine converted by Jagg Engines. It has a metal cable for the throttle pushrod. It will be a major re construction to change this set up. The gas tank box is glued in and would have to be cut out to allow access to the firewall and pushrod. Is there a non metallic pushrod that would fit in the same housing as a small cable goes? Any ideas would be appreciated. Also the kill switch is mounted about 6" foward of the receiver is this far enough away.

thanks,
fossil