Autocycleplane
Cruisin' on my Bluebird
After you're done the stack should measure 0.750". This is the thickness when new.
The shorter the stack, the more kickback required to engage the brakes. Also, due to wear of the clutch sleeve and inner surface of the hub, you make have too much kickback for your liking. More discs can be put in to shorten the play.
There isn't much about these hubs I like, but that is one nice little trick I learned about them long ago. When a Morrow has too much kickback, unfortunately you gotta replace a bunch of parts to fix it. Nice tip, way to share.