Yes - I have been running SS tyres and a Mandatory stop mid race. Looking at my run in the FT1,I was a bit of a guzzler on the fuel! On my usual run I needed more than 13 extra litres of fuel. As I knew I was pitting I was pretty rough on the tyres - You can get away with a lot of hard driving when you know you are going to do a stop for fresh rubber. I enjoy the race as the track is fun - and the added factor of tyre wear and fuel makes it as interesting as you want it to be. Get a race where you win but run out of fuel over the line... try the race again but use 5 litres less fuel. Going for a none stopper with a car that is marginal on fuel is a different challenge... As is making the tyres last. Doing a single planned stop after 4 laps is the safe option - But lets me see what a car can do - and what a good future challenge could be.