Just to add more fuel to the fire although the car does look stunning it aint a s1 otherwise you would be showing pictures of the engine bay to show the strut tops.
It is a shame that you believe its genuine and it certainly never came from factory red if you tried selling it as a replica you still may get the money you want as to the quality of the rebuild on an earlier shell. but while there is still this shadow over the car it will be hard to sell and only a fool would buy it as a genuine s1.
once again sorry mate but you've been had good and proper.