A 1 tooth dogbox! lol That's a great idea! Maybe it is the angle of the picture but in the second picture (top view) it looks like the dog gear is still engaged in the forward gear when it starts engaging in the reverse gear, in other words there is no neutral in the middle. I am trying to imagine this operate and it seems (to me, maybe I am wrong) that this will make it harder to engage, because while it will be trying to grab the reverse gear while rotating slightly, as soon as it will try to grab, it will still be slightly stuck in the forward gear, and kind of binding. Do you see what I am trying to say ? Whereas if they were just distanced enough so the dog gear cannot touch to both gears at the same time, it would allow the two gears to rotate at different speeds just before engaging, making it easier for the speed to sync and snap in place.
Maybe it is already all good and the pic makes it look closer though
that, or maybe I am wrong too hahahahah
Are you going to mount the middle dog sliding piece movement with a spring? It would allow the servo to go say in reverse, but still allow the dog piece to not be in reverse mode until the gears start moving and the pin aligns. Say if you are not moving, and engaging reverse, the servo would not struggle trying to push the piece, but only keep a tension so the dog is ready to engage when aligned.
I find the whole idea exciting and can't wait to see the first vid of reverse testing!!
Fred