I had the Kubota KX033. It performed great. But on hills I had a good bit of pucker factor. Didn't really need outriggers for that size but I always put the blade down for stability. Like collie said, the blade is the key. Without it down you rock an roll. I never noticed it being top heavy. Being new at it I did work slow and talked a good bit to a friend who is a heavy equipment operator by trade. His tips helped but nothing better than hands on experience.
Still amazed at the work it helped me do. And I could sure put one like it to work again, but have a hard time justifying the cash outlay. One of the tow behinds might be able to help me a bit. I would need one with at least the reach my KX033 had which was 11ft ....and I could have used more to reach up the hills to clear the brush away while sitting on the trail.
I got lucky when I found this one. If I remember right it was a 2017 and it had 500 hours on it. I bought it for 25k. used it a couple years and was able to sell it for a bit more than I paid. Very fortunate.
When I was shopping ones I found in the 10 to 15 price range seemed like they would cost me a lot of dollars in maintenance or repairs.