I've been running a Kuhn 9 ft. disc hay cutter on my JD 6403 and wonder how well it would work on my Oliver 1650.  The disc cutter does not put equal force on each of the two lower arms of the 3-point hitch.   It will  pull down on one side and up on the other.  If I try it, I would have to make something to lock the lower arms in place.  The 3-point hitch on the 1650 isn't as sturdy as on the new larger tractors.  Has anyone done this?

Thanks.

Ronnie S