Umm.... *coughs politely* Putting a container on the ox, even to fix it, is still technically an exploit and a way to carry more things that you should be able to.
I have been talked to before by a DM on the IRC channel for mentioning this idea to someone.
So my advice to you:
Just find a DM, it might take a 'slight' bit more in time, but you won't get in trouble for it.