Definitely think size of cars should be targeted here. Refuelling can be safe but just because it’s technically possible doesn’t mean it should be done.
I think it would mean less on track overtakes and, whilst F1 is supposed to be endurance to some degree, the length of the races doesn’t mean we need to refuel unlike a more traditional endurance race. Plus you would lose the need for a driver to be able to manage with a fuller fuel load - they could just push for more of the race unless the pushing + lighter car causes more degradation than current “heavier” cars
It's testflight