Well, when you get REALLY good at taking apart and putting back together, you won't have anything left over. What you will have is something that either doesn't work like it should---or doesn't work at all.

The latter situation arose during my latest disassembly/reassembly boo-boo. I reassembled a rear target sight (spring/blade/screw), and it worked just fine. I'm almost finished. The last step was to install the cylinder stop plunger/spring/screw---a piece of cake---except the cylinder stop didn't work at all---just sat there---no down and back up---no nothing.

After a suitable period of sitting and staring, it came to pass that the sight will work fine with the cylinder stop plunger spring in it----and the cylinder stop won't work at all with the sight spring providing the power----'cause it's it's just a tad shorter.

The moral of this story is you live and learn---if you live long enough.

Ralph Tremaine