I rebuilt mine with sectional flighting made of 1/4" stainless. It wasn't worth it in a way. The original auger had a slight wobble. After cutting the flighting and rewelding the stainless, it shook even more. Long story short, it works good now, but doing it again I would try to add to the original flighting.
BTW, the 1/4" sectional stainless is wearing much quicker than I ever anticipated.