Yes Stefan, it's always a pity wasting resources, but now I take the advantages I can from that set, in particular the details on the cowling, as gcn did before me!
I will post some new pics soon.
Now I went forward on my search to understand how to replicate the stitching on top of the cockpit.
I found these three pictures:
Sgt Stephen Bigelow
Billy Bishop
So the leather belt covers the stitching. I will glue a thin plasticard belt over the stitching, leaving the lower part of the stitching visible and scribing the belts from behind so that they appear covering the rope.
Also the picture of Baracca's plane a few post above shows this ...
Thanks for commenting and for further suggestions.
Antonio