Gorgeous machines.
I think the KDS-17a is the best dishwasher KitchenAid ever made. We had a Custom model from the same year and it was one of the best we ever had. I remember it as being fairly quiet. The noisiest machine we ever had was a 1973 GE Potscrubber with the lousy pump/recirculator and the green plastisol on metal tub. That machine was a severe disappointment and convinced my parents to leave the all-GE club once and for all. Yoiks!
I have two 17 Superbas(one 17, one 17a) in the basement that I'm planning on cannibalizing into one machine one day. I'm going to need to ask you for help when I do.