The only worrying thing is that the work is being completed very quickly and I think the thread will be finished very soon!
Don't worry about that. I have looong "TO DO" list. There will be a lot of work until summer
Some not common upgrades:
1) Electric water aux. heater (like some BMW's have) - it will heat coolant, so the engine will get in operating temperature faster. Now just on 12V when the starts up, but in future can be also operated on 220V in garage to preheat engine(often used behind polar circle)
2)Custom made vehicle information system - It will measure oil temp, coolant temp, cooler temp, oil pressure, outside temp, main battery voltage, secondary battery voltage, charging control, START assist function, WINCH assist function, water aux. heater control.
Most functions are already working but need some debugging in real world.
3) Second version of camping bed/storage system.
...and lot of minor upgrades.