Hello gents,
Thank you all for replies!
I am glad to see that this model brings good memories!
1974 - that was a long time ago as we can see on the pages of the model which got really yellow/brown towards the edges.
Going back to the model...
The 2nd segment should be a bit higher (say 0.5-1mm), so to get a proper fit you would need to enlarge it (re-design it).
I managed to get away from re-design it because most of the gap gets covered by the cabin cover if you align all segments from the bottom.
Please see the photos
kind regards
Cybermac