Backing my JD6430 the clutch response in A-1 to be very quick and hard to back spot on. It seems dangerous especially someone is back there to pin the equipment tongue. With a MF1840 Baler you have to be pretty exact with the hook up. Not much room for error. After the last baling I noticed that I had more control using C-1 in reverse and the clutch was not as quick to respond which is good because I don't want to knock out the back wall of the shed. A-1 reverse is too quick to respond and makes it hard to creep back.
That was a problem on the 6000 series I did not like now problem solved.
Food for thought!