Sounds like you had a mad learning curve mate! I'd hate to lose the pyro over the boost gauge, I'd be sh1ting bricks too! The workshop always lures me into a false sense of security before hitting the mud.
Sounds like the axle may have saved you a new xcase, when you look at the split case...
Rocket you are an absolutefarkenlegend!
You're workmanship and dedication to this project is some of the highest I've seen, you should send a few photos across to Toyota with the subject line: "how the FJ cruiser should have been done" then go on to detail how the only reason Toyota can't...