Nice! The whole warranty voiding bit is enough of a concern that I'll probably wait to add a hook, but I do really like that idea. Another friend did that with his bucket and seems to make a lot of sense and add a great deal of functionality for a variety of uses.
Todd,
When I got the Kubota. Dealer said most people weld hooks on their bucket. Told me not to because it voids the "Entire Tractor Warranty". Also, if you hook chains up where they are not supposed to, the warranty is void. I had a 6K warranty repair. A bearing split in the rear end which busted a lot of stuff. They went over it like a forensic team looking for misuse, and found none. Whew!!! Fixed for free and it works better than new. I think the bearing was bad in the first place because it is much smoother running now. He showed all the busted parts and the bearing that split. Knowing a bit about failure analysis, it was easy to tell that the bearing was bad in the first place. That said, if they found any marks from like chains, etc... bad bearing or not, it would not be covered under warranty.
They also void the warranty if you use implements not authorized by Kubota. Kubota and Land Pride are the only ones I know of that wont void the Kubota warranty.