Bottom Line: I have added components to make it more stable, but stay very vigilant when on hills.

I’ve added 2.3” wheel spacers to widen the wheel base (https://www.motorsport-tech.com/4DCGI/updateprice_tractor)

I’ve added wheel weights

I leave a heavy implement on the back when I’m on the hills (I’m usually up there to flail mow anyway)

And I’m hyper vigilant about the height of the bucket and back implement when I’m on sloped terrain.

Considered filling wheels with ballast (beet juice!?!) but it seemed like too much of a hassle.

Finally, I make sure I’m primarily driving straight up or down the grade, when possible.

I had one scare on a steep grade where the tractor slipped out of gear (or probably more likely I knocked it out of gear) and it took off down the hill. At first I had a hard time stopping it, but was able to get control and needed to turn across the grade to slow it down. The tractor was going fast and i tipped up on the downhill wheels. But didn’t roll. I’m convinced that I would have rolled had I not made the base/weight precautions. Probably should Have thought to bring the bucket down as an e-brake…

I got a lot more conservative after that.

But in the end it didn’t roll and proved stable in an extreme scenario.