No metal pieces/spacer/washers?
But a spring & clicker "bullet" (like the clicker on a Star drag).
Nylon piece below that it clicks on..
(18 Preset Idle Gear Click Plate).
""Only 1 spring and 1 Bullet/clicker in this one, but had holes for 2"" 
??
(maybe you didnt lose one??)...
But you still need this one!!!! :-)

Bullet/clicker is 2mm Dia and about 3.5 mm long..
spring is Tiny Almost 2 mm wide & 5 mm long....
Fits over back skinny part of Bullet/clicker, they stay together when taken out...
It is just enough to give you a feel & light noise of clicking when you depress & turn outer ring.
All 3 of those parts in schematic come to total of $2.96.....
Plus shipping from Tulsa, Ok....
BTW, the parts Numbers on the 30 are the same as 18, 19, 20 on the 20...
KF113-01
JF108-01
KF070-01
Same parts, interchangeable.....
.