I had a K-Two Duo. It was a monster of a thing!I had one of the first K2 mowers. It was based on a similar design as the Grasshopper, and Terry used to work for them.
I remember at the time Grasshopper tried to sue him for copying it, but he had proof that Grasshopper itself copied an East European design.
As to the K2 mower, not their most glorious hour!