I doubt any PTO powered three-point hitch tiller is going to work on a TO30. I run a 5 foot King Kutter on my TO35 Deluxe -but the TO35 has a live PTO and a creeper 1st gear. TO30 will be way too fast in 1st.
A three-point tiller with its own engine is what would work. Then you can idle the engine down to get a slow ground speed and the tiller will still work properly.