I temp installed the advance unit that I am planning on using which has one shim and found that the end play was about 13 thousandths of an inch while the other unit which has 2 shims (a 0.010 and a 0.005) had about 7 thousandths end play. I took the 0.005 shim and added it to the other advance unit and reduced the end play to about 7 thousandths.
In the course of doing all this my old E-Clips are all stretched and I need replacements. I saw
@Amannl's thread CB450 auto advance e-clips,
https://www.vintagehondatwins.com/forums/index.php?threads/cb450-auto-advance-e-clips.10793/ and wondered if you did get the 4 MM clips from McMaster Carr and if so did they work for you? I found some 4 MM Honda clips online, P/N 94540-04018 and stopped by the Honda automotive dealership to order some but was told they were back order and not available at the moment. I tried some 5/32 e clips from Lowes but they seemed to small and did not fit properly. If anyone has a good part number or source for clips work well I would appreciate hearing from you.
Here is a photo showing the OEM e clip on the left and the Lowes clip on the right. Notice the difference in the way they are made.
View attachment 37429