a thing i do with stacks of parts like this... i lay them out, As Removed, from a machine.. i've used empty egg cartons to separate them, in order, too.
the parts can also be placed back on the machine/fork/whatever, loosely assembled, as you await parts or customer approvals.

if the machine needs to be set aside, awaiting part, etc, i then tie headset stacks together, IN ORDER and Direction of assembly, with a twist tie, Zip tie, or piece of wire/string, etc... once the needed parts arrive,m there is no time consumed sorting things out again.



tip two... i bag the old/bad parts for the customer to look at, or for a 'show and tell" with them.
they can actually SEE WHY a part needed replaced.
I Just did a show/tell last evening... i even saved the paper towel with the total sum of grease and dirt from the bad headset.. there was next to NO GREASE on the bearings, but PLENTY of shiny, expensive Frame Metal Chips on that towel...!
i heard the Word "WOW!" many times.... and got a big "THANK YOU!", plus a 5 dollar tip too.