KDS-18
I have the Short Wash Arm, and have used the Longer version (Wash Arm that us), and Nothing cleans better. I might be on the Hot Trail of a Vintage Fridgedaire Portable. Stay Tuned !!!
But in the mean time, KDS 18 All The Way. The Over Head "Constant Rinse" gets rid of the yibbles on the top of stuff in the Upper Rack. Why they never worked on that was the biggest disappoinment when they dropped that on the rest of the machines built. You gotta have something overhead to rinse the Crap off the spray from the bottom from either racks.
The AM 14 at the restaurant and for a matter of fact, All Commercial Machines have a Upper and Lower Wash Arm. Makes Sense, doesn't it ? All my Vintage KA's clean well, as long as you have plates in the Lower Rack and put concave objects in the Upper Rack. I feel this limits the capacity.And I still sometimes find Yibbles on the stuff in the upper Rack
Just My Opinion. Eddie