Hey that's super cool!

We looked at using a paratill that injected manure pellets behind it for the same thing, with the idea that the manure would encourage deeper rooting/long term break up. It kind of worked, but not really. It was also really labour intensive and expensive.

Throwing something like this into your rotation would probably work a lot better given that an article I read (Raper et al 2001, I think?) found that while subsoil tillage works, you need to do it at least every 3 years; not a one time treatment like we were doing.