Since I bought the 6-UP, it has been upgraded several times. First it got new cabin doors plus a new rear hatch. But then the real upgrading started by adding the following items:

rear window defroster

headrests

original VW 3-point seatbelts

blower to boost the hot airflow while waiting for traffic lights

ventilation windows in passenger compartment

fresh air pipes to passenger compartment

mum-made curtains

Westfalia trailer-hitch

Westfalia SO-67 interior from 1969

rear fog lamp to warn car-drivers in rear for 6-UP not being elephant
(used to have the "leaking exhaust option" for that purpose)

Unfortunately I can't drive it anymore. It has soo many spots where it needs welding to pass inspections, I decided to concentrate on my other vehicles until I have money to get some professional equipment to finish the job. Looking at the quality of the bus it should actually be junked, but I got attached to it after all those years that I do not want to part with it. So now it's resting somewhere in a dusty barn in the north.