The two things I see are that  are at all negative are (1) that puppy is going pull like throwing out the anchor & (2) the shovel bringing up big ol wet slabs of our yellow clay.

To the plus, you're not limiting application rate at all, you're getting the ammonia well below the seedling area & sealing shouldn't be an issue.

I really think those rolling cultivator sections would be something to see run. I see that as the biggy over a standard mole knife/disk sealer combo & I've had no issues with the moles in my own soils...