Does anyone know how much hp the 3x3x3 synchro box is capable of handling? The 300 series topped out at 120hp, I have been running at 130 for 5k hours but temped to fit a turbo and go up to 140-150 odd. The gears inside are about the size of a small car, tiny and I have been running 75-90 semi synthetic oil. Anyone here good with these fendt boxes or is it a job for the sausage munchers on fb..?!!