@phattyduck thanks for that, I'll look into strengthening and stretches for that part of the neck. Either way it sucks, can't get much sleep these days. Might be time to hit up a doc to see what's going on.
Today the work continued. Got the battery cut off switch mount made (looks great), got all the battery cables made, got the up sized grounds remade (batt to fender upped to 1/0awg and the firewall to back of cylinder head upped to 4awg). Test fit the batteries and they fit perfectly. Also hard wired the air compressor, and wired the solar to the bulkhead. The solar panel will be the last thing installed. So all in all, all the large awg wires were made today. Also torqued the rest of the stuff today as well.
Didn't get to the small wire house side stuff. Probably will tackle that next week. Hopefully it should go quickly, as it doesn't require specific clocking of the lugs before crimping.
Then tonight the switch pros sp9100 decided to freeze up. I'm guessing it was when I was making the new grounds. After dinner I disconnected the negative for a few mins, hooked back up and now it's working properly. That gave me a scare as that thing isn't cheap to replace.
Might mess around with some of the easier wiring jobs tomorrow, fridge, switch controls, mount up the battery cut off.
The lifpo4 battery's need to be fully charged, then connected together for 24 hours to balance all the cells before use, that will be done soon. Before the solar panel gets installed.
Sorry, I'll get pics tomorrow, been hyper-focused to get the stuff done to get pics.