I'm sure they machine the housing's for the larger shafts/wheel clearances, but it's no wonder there's been some issues with the FP Black though. The problems I've heard of with the FP Red's were road course cars taking high G turns, which knee jerked the "oil line kits" and now this. Is it the really oil, high G turns, not sufficient oil pressure from the stock location, bad design, or a little of all those, we'll never know I guess. Comforting to see you could possibly flog the FPRed @37psi for a good chunk of mileage though I guess.