The control rods under the seat have been installed. Each rod consists of 16 individual parts. Riveting the end pieces gave me quite a headache until they were finally secured, with a round head and no dents.
After checking the CAD, it became clear that the original rod heads didn’t allow for the full control travel, so they had to be modified and individually machined from CrMo steel.
The securing plates haven’t been folded over yet, so the control can still be adjusted.