Steve,
Very awesome! One idea I just had was sort of a tailwheel chock I could attach to my hangar floor. Right now I used a piece of blue painters tape to let me know how far back to pull my plane. Occasionally when distracted I pull it back too far, luckily never leading to any dented metal. This concept exists for garage's, where there is a mat you can lay on the ground which prevents your wheels from going too far back, and your bumper wiping out your mountain bike

Maybe you could design something that could be attached to the hangar floor, but also not too bulky that it would be a tripping hazard when the plane is pulled out?
Glad to see you participating over here at RB. Hope to see you at Osh at our Black Otter Prime Rib Night!