Since I only have a 12 bolt, I'm going to get a spare (or 2) axle to have when and if it breaks. Do the axles tend to break one at a time or both at once? I'm not real hard-core on it, and the first wheeling trip will be in moab. I've got it apart right now for disc brake conversion, should I put some better axles in it now while it's apart or just keep a good spare axle to swap in if it breaks out there. I figure i can live without spare front's since I can just unlock the front and drive out if one broke. Is that a dumb idea?