Last ditch effort because I ship my 2011 SFS to the dealer.
Don't give up dude
Canbus is no mystery it's just a network over 2 wire between ecu, dtc and dash.
Behind dash it's pin 5 and 12 i would trace these.
Pay attention behind the headlight where the wires moves, good place for a short. The 3 places in the tail i highlighted in the referenced thread could be a good place to look too.
If cabling look good try to unplug dtc module and try the bike.
If you can borrow an ecu and put a map with immobilizer disabled it could be a good test too.
If everything is perfect, this will point to the dash.
But seeing it's part time, my guess is the wiring harness.
I don't know why some say the electrics are special, it's like any bike and will give you trouble if you pinched a wire somewhere, or one rubbed to ground. No you won't have any error for a burnt bulb. A pinched wire will quickly worn it's insulation, and loose wiring too.