Brandon,
I did see your invention a while back and think it would work pretty good.
I typically let my loader off on the ground and when hooking back up I just turn the bucket forward causing the bucket to stop the loader from moving. I keep it in a place where I don't care if it tears things up. Now next year I hope to have a garage with a concrete floor and then your idea would work great. So I will be keeping it in mind.
murph