Funny you should mention flimsy runningboards on the G6200, I just broke mine the other day in just about the same exact location yours is broken! The diamond plate does sound good, especially in that Kubota engine blue!
I was thinking of just patching mine with a little resin and then reinforcing the back of it with some sheetmetal or something.
The fresh paint on the rear cowl and the deck look awesome! The orange paint is quite faded on mine and the calcium weighted rear wheels look awful.
Looking at your pic it, it seems like your tractor and mine both originally came from Capital Tractor South in NY state! Not unbelivable since we are both from Western Mass! Small world.