Jon: I think Warranty Exchange works like this: You return Minibrute to the store you bought it from. They give you a new Minibrute. Did you buy in a store, or online?
My repair is still working. It's possible the repair may break someday, it could be years. IF that happens, I'll just pop the Brute open and re-glue it.
Tertior: Normall, yes. But the piece is not a bumper. It's the thing the bumper is attached to. You'd have to completely dissasemble the keybed to change it - and it runs under many keys. You'd have to remove the underside PCB sensor board, etc. It's not a simple fix like a missing bumper, or glueing the bumper assembly. It's probably a warranty voiding situation at that point.