UPDATE: The Q-tip extending just beyond the end of the hollow post created a nice degree of knob-spin resistance, but apparently created some stress on or distortion of the knob's shaft and or optic throttle sensors that flank it causing the Cab-1 to not always work as it should. For example, turning the red knob counter-clockwise could occasionally result in the engine speeding up instead of slowing down. However, cutting the Q-tip shaft flush with the end of the hollow post restored proper red-knob throttle response and leaves the knob with a reasonable amount of spin resistance or sense of control - much better at least than the free-wheeling/free-spinning that it had before.
Dave
