I have Morrel Styrofoam fly boxes for fishing. But I also have a lot
of "extra" flies that I don't want to carry around. I may tie a dozen
flies of a given size/pattern at a time when I'm on a roll. But most
of those are just "extras" until I'm needing to re-load a fly box due
to loss of flies.

How do you guys keep the "extras" organized until you need them? Or
do you just have a ton of fly boxes?

Just a curious newbie question.

- Dave K.