Jonathan, I checked the set screw on the back of the hydro actuator arm that you highlighted. You got it! It was loose. Tightened it up and it works perfectly. I can't thank you enough! I just missed the set screw. I am one happy cub driver.
Thanks for the offer to help Sam. Luckily I don't need it.
I'm gonna go have a cold one and a cigar to celebrate. Jonathan I gotta send you one!