ORIGINAL: MARINE AVIATOR

Hey all,
I am actually building a Bob Holman B-17. 120" wingspan, 90" fuse. I'm using one Futaba heavy duty servo (w/ metal gears) It's binding only with the wires at tension. I disconnect the servo arm, and it swings pretty freely. When it's hooked up and I run it full left and right, it doesn't return to nuetral and the servo is humming. I think I need to support the bottom of the shaft that I put the control arm on. I figure using some kind of ball bearing device would take the tension off the shaft and make movement alot smoother. Kinda like the difference between metal on wood vs. metal on metal. Thanks for all the help.

Dan