I am designing something which requires an articulating tentacle which can bend along 1 axis. The best way I've found to do this is by utilising a fishing rod type mechanism. You know how when you pull tight on the fishing line of the rod, say your winding it really tight, the rod is forced to bend to accommodate the contraction of the line? This is how I envisage implementing my evil robotic tentacle. My question is, does anyone know what I would need to Radio Control a servo motor that would drive the "Fishing spool" backwards and forwards? I just need a simple forwards backwards thing. Nothing fancy. Any help would be appreciated and I will post videos of the tentacle design once its done.