Works when too wet,
Open the soil and start the drying,
After about 2-3 days it is too dry for light weight setups.
Ron in South Dakota came up with the first ones.
4 heavy duty ball bearings,
Works great for 3 years.
Then replace the bearings.
He licensed it to Yetter,
After 3 years, tighten the tapper bearings, good for another 3 years.
Another outfit, Willrich? Sells them also.
RedE , Farmland manufacturing, has another version.
Staggered Coulter setup, that reduces the slabbing when it is too wet.