Good morning,
Thank you albatross and paco for the tip. Unfortunately it doesn't help me, I'm looking for the details as I wrote above, fuel cap, rivets, cockpit you can't find them on a blue print or anywhere else, they would have to be measured on the original.
For example, with the rivets, if they do not look to scale, the overall picture will not look nice.
Unfortunately we don't have a museum nearby where a BELL 206 is on display.
Wish you a nice day - Marco