For Group C I was thinking of Slot-It cars only, The Lancia, Toyota, Mazda, Jaguar, Sauber & Porsche 956/962.
I'd like to see an F1 class but I'm not sure buying a car then replacing everything is the way forward, Let's see how Ashleys car goes first.
As for magnets I thought one was bad enough but two sounds like torture, We've run non mag F1 in the past and a sprung guide was all that was needed.