I wrestled the last axle drain plug free with some heat and some good contortions and luckily didn't strip the already stripped out drain plug. Drained and refilled, and put in a new plug. Since I had the gear oil, decided to drain the transfer case too. The inspection plug had some sealant on there. Hope it doesn't leak when I cracked it open. Refilled that guy too, it's a tinier space, so hard to see the level. I also found that I did not snug one of the other axle inspections. Tightened that, and then took it out, and cleaned up the garage floor of random slippery gear oil.
Tried to find my leak on the master cylinder of the M103A3 trailer (MKT) and got sort of screwed by the glad-hand gaskets, so ordering some, then attempting again. It just doesn't feel like it's leaking, and I did a REALLY close inspect, pumped the brakes and messed with the hand braked on the trailer. Maybe no leak is a good thing.
Also mocked up my CTIS visualizer on an Arduino. No guts or feeds yet, just the UI. Its attached to my backup camera monitor. For those looping in, here was my project summary.
#116
And here is my mock up.
https://youtu.be/4QWraNRuirw