Although some "3-stage" owners have reported that that center auger both interferes with driving into hardened snow pack and can easily get deformed when dealing with ice chunks.
Yup...Come to think of it, the center auger must be spinning at high speed, same as the impeller.
This is interesting (in theory). Let's wait for the actual use reviews.Yup...
Next Level Power
Three-stage technology features an accelerator that spins 10 times faster than the augers to break down and quickly clear heavy, wet snow..