Looks nice and will probably sell. I have gone the low tech route for years without too many problems. I have a 2x4 about 18" long with a 2x2 nailed on top that my tire runs up against, which does two things. It lets me know when I'm in far enough, and if I try to ignore it, it will stop me. The only down side is the tripping hazard, which as I get older, gets worse. Just using the KISS principle.
Joe W.