Having owned a B3030 Cab as well as a M5040 Cab and L4060 Cab I know the HST whine in the B3030 is terrible mostly at PTO speeds.
The M5040 was really quiet and no HST whine due to it's manual transmission, and my L4060 Cab with HST is much quieter at PTO speed then the B3030 was.
I ended up...