Thanks for the feedback Roy. The previous thread was not for my machine, but I will see if I can find it to see if I can absorb a bit more of the expertise out here. I will have to find a balance for mine, since it sits about a foot off the ground when the PTO shaft is level.
I like the idea of a couple pieces of 4x4. May have to see if I can just bolt a couple on to reduce that gap. Maybe I am just putting too much emphasis on trying to keep the PTO shaft level, and not enough on keeping vibration down to protect the PTO itself ... I think a shaft would be a LOT easier to fix or replace