I had a 5' KK finish mower that was a nightmare. I had to replace a part every 3 or 4 mowings. I keep it for 3 years and had to do probably 20 repairs and 4 or 5 welding jobs. It was so frustrating and I had spent a good $500 keeping a $900 mower working for the 3 years I had it. Sold it on Craigs List for $500 and got a 6' Caroni that is awesome. Not 1 problem in 2 years. Well wait it did lose a bolt on the chain guard but that is it. A $.15 repair with a 1/4" x 1" long bolt, lock washer, and a nut.
Chris