Wow, some interesting measurements! A couple of points about Deon and CASCU that might explain some differences:
DEON is a mould of a mould of a mould taken from a genuine Ferrari Dino 206 (wheelbase 2280mm) but the position of the wheel arch was altered on the original mould to match the owner's chassis - which was from a Lotus Europa (2311mm).
I believe CASCU's was moulded from a genuine Ferrari Dino 246 (wheelbase 2340mm) 2340-2311=29mm difference.
Some other points: I read recently that the chrome trim over the side glass of the 206 matches the 246 and that windscreens are interchangeable.
http://www.lotuseuropa.org/gallery/D...otus_2_Ferrari
I'm going to measure my front clip from a genuine 246 and post some pictures for comparison.
cheers
Ross