Hey Don, I know you are an experienced builder and this is no way a jab at you, or the other fella for that matter. Your setup looks nice, but it still gives me the heebie-jeebies. I had the unfortunate experience of being in a vehicle that had a shifter with no locking detent when it jumped into park at around 50mph. Wound up facing the wrong way in the ditch on the other side of the road. Luckily other than some soiled undergarments we were both ok, but we were just that - lucky! I know of at least two other similar incidents involving people I actually know and sub-par automatic shifter setups. For that reason I am a big stickler on this one. Looks like you could possibly adapt one onto the tailshaft maybe? I am the last one to call in the safety police, but just lookin' out for you fellas!