Just curious: would you add a set of welded coulters to front frame if you were using this drill to plant into heavy residue?
So, I'm definitely into this idea of creating rather than expending mass amounts of money on a manufactured no-till drill. But the thing I can't get my head around is how to create a functional drill that moves the heavy amounts of residue (thick thatch that's needed to suppress weeds in an organic systems) aside or cutting into those layer prior to opening up that v-shaped furrow for the seed with your disc harrow blades. Would it be reasonable to you to weld a separate frame that contains arms for coulter blades to bolt into?