As for me I don't want a "player based pit crew management",first the thing that you will be doing there is driving,the current system in GT4 is the best for these situation you take the decision about the tire compound and maybe the fuel to be added,and for 24 hrs. races no save point,I know a lot of people will not like this but that kills the spirit of endurance racing in the first place,besides of that the AI can be used by an B-Spec mode so no need of changes there,the fact that the driver do something that is not meant to be done by the driver is rather pointless,again is just my opinion.