Given r2/r2 was the way to go, running R4(!) at the front and R3 at the rear was just... well strange. You might have thrown away your entry into GTAL with that choice... it was an awful one... r2/r3 maybe, but R4's tells everyone that your driver has no clue what he is doing. I feel a bit sorry for your second driver, he seemed more than good enough for GTAL and I'm sure some other teams will look at him.