All good points Jan.
On another note, although probably nobody cares, but to correct myself, I mentioned the Beta Montecarlo Turbo as not being constrained to the use of Macpherson strut suspension after making the assumption that the Group 5 cars were pure silhouette racers, but then started having some doubts about that and a quick internet search on the former FIA technical rules ( argent.fia.com/web/fia-public.nsf/whistj?open ) proved that assumptions wrong and revealed that the suspension type of the base car had to be retained. So that leaves the Stratos as the only high level competition car in the more recent history, that comes to my mind at least, that was designed from the ground up with Macpherson strut suspension in mind (using one at the rear).