I have these controls on my 56SS. I had a failure of the controls. Very scary since the boat was in gear. I have mechanical backups in the cockpit but not on the bridge. Has anyone ever seen the need to install mechanical backups on the bridge, where most of the running and docking occurs? Also, the mechanic said the failure was due to a too stiff spring in the ball detention gear shift on the back of my ZF transmissions causing an overload on the electronic controls trying to move the tranny gear shift lever. Anyone ever dealt with or heard of this? Just trying to make sure this never happens again. Thanks.