Not really an answer to your question, but. What ever you do, be sure it does not put you out of compliance with your conservation plan, if you have one. FSA has NO wiggle room if your found out of compliance on HEL ground.

 Lets see, new axles all the way around on a couple tractors, or paying a fine to NRCS/FSA ---- wonder which would be more $.   ??? 

oops!     My reply was supposed to be to the original post.