Why not learn to run the control as it was "meant" to (my opinion), as a dead man control? Keep your hand on the throttle with enough pressure on the handle so power is applied to the track but not down in the keeper clip. If there's trouble on the rails up ahead, just relief pressure on the handle and everything stops in an instant. Pulling the handle out of the keeper clip takes more effort and time in an "emergency". Yes, putting the handle secured in the keeper clip allows for running a train unattended but is that "legal"?