Very nice - now you can be "stylin" with a dishwasher that gets every thing squeaky-clean in under an hour!
I love my KDS-18, I put a later rack & wash arm assy. in mine to get the better washing in the corners of the top rack - the rack from your 20 series will slide right in. I have the spinning disc constant rinse in my 18 - not sure if it makes a huge difference which one it is as long as something is spraying the tops of glasses. It certainly is better than the slit in the water tube of later models. You're right about the needed redesign of the Constant Rinse - it could have easily been done as the plumbing was on the outside top of the tank anyway.
Best of luck on the water test, she looks just beautiful!