One accessory port on my postwar ZW. When it didn't work after first hookup, I removed the sides and found the thread hanging loose. It appears that thread would just go back around the pulley and hook back to the spring, but there is way too much thread left that hangs loose. When I tried to wrap the thread around twice around the pulley and connect back to the spring, there was not enough length to make the connection.
I was hoping someone might have had this same problem or something similar and came up with another method to power the accessory. I hate to remove from the layout as it is a big hit with the grandkids.