I have been trying to figure out why the PTO u-joint near the tractor was rubbing the frame since I got this thing. I finally found the problem. The PTO pivot bushings are toast. Luckily they are a 1" OD X 3/4" ID flanged bushing bushing and easily found. Here's some pics for you guys.
This is where it has been beating the daylights out of the frame when I used the float setting for the deck.
And a little later, I had the shaft out and could see where the issue is.
That makes me happy as a new PTO Pivot assembly is nearly $300!