I don't have the flex forks on my machine, but could see why you might have problems. The demo I took out seemed to allow alot of flexing down on undulations causing uneven cut. I guess I could try to slow the blades down, but would rather it just worked better without having to jack around so much. I love everything else about the mower but the deck.
“Rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add "within the limits of the law" because law is often but the tyrant's will, and always so when it violates the rights of the individual.” - Thomas Jefferson