For a 1 off race, the Yellowhat, Xanavi, Motul and Calsonic are really easy to balance. Just need to raise the weight to match the Motul (I think it's the heavy one) and the rest works as-is @ 518 hp / 1130 kgs.
I'm really curious to see if Gamesta's lounge still has that 1 second of extra grip in it. Magic it was. 👍