Gordon Couger writes

We also had a difficult time building the plow and getting it to work. There
is more to one than there appears to be and modern methods couldn't do much
to improve it either. The only thing we could do was use a wider point for a
few days after a rain than they do. But the price of steel over there is
such that the sweep is about 5 times as expensive as the point they use. The
point they use is not that much different than the narrow chisel point on a
chisel plow. It is just not reversible.

This doesn't surprise me.
It has had an extended development period already.

Doubtless the point could be readily made from old truck springs.

--
Oz
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