The Supersport wheels were the same design as the classic RS 4 spoke alloy, but were only for fwd, they look the same bit are not dished and have a different offset Mike.
I still have one in my shed for some reason..
Thankfully I was right about the engines from memory JC, I'm not an anorak, I just grew up near the only Ford RS dealer in Dublin, Richard used to rally an ex Malcolm Wilson Mk 2 and had a beautiful RS3100 Capri with X-Pack arches as a road car.