Brian,
While not specifically stated in the video, I assume the washer sharp edge side goes down to the lower disc, and the smooth side goes up to the nylon disc. After being compressed inside the mount for a year or two, perhaps the jumpy side won't be as obvious. Some smaller size wavy washers I used in the past lose their spring tension and go flat over time. Hope you can clarify this point. The sharp side would probably dig into the nylon more easily, as has been mentioned in this forum in weeks past.
Many thanks,
John
