Excellent work Bernd, it looks superb. The bike brings back memories too; a girl friend of mine had one, in the mid 1970s, until I took it for a low-level flight into a ploughed field !
Seat mounted to the bulkhead. The harness is cheap masking tape colored in Revell 89 with aftermarket knuckles-from Extratech.
A light washing finished the harness.
Some remarks about the fuselage:
I had to make some quick decisions.
I cut off the nose cone because I wanted to show the details of the inner front wheel gear. Better you do this by scribing. If you cut through at the groove as by Revells manual you will destroy the cover panels of the canon channels. On the real thing this was a thin steel sheet which overlapped the nose cone.
The workstation of the pilot:
I scraped off the details on the side walls and did new ones from plastic sheet. After this I built new details.