I'm out back the other day and my neighbor is loading stumps in his dump with his new Kubota excavator. I happen to be looking down there when BANG! the bucket just FALLS OFF on the ground! You don't see that every day. I walk down & he's looking in the dirt for parts "grumble, grumble, that's the 5th time that's happened!". Say what? Look at it and the quick change, I assume it's Kubota, is the stupidest design I've ever seen. Hard to describe, but has a pin with a lynch pin holding in in- yeah, that's going to work right until something flips that bail up and the pin falls out. I'm sure I can come up with something that will work better for him but for now just a 3/8" bolt double-nutted holding that pin in.