You consider your Ion to be your "reliable" gun to bring to the field in case none of the others work.
You finally realize that stripping the front block and pneus off a 'Cocker that you intend to pump doesn't mean you need to sell them. It's time to start building up a parts bin until you have enough stuff to build another gun.
(that finally hit me today as I was stripping my '02 to send off for lasering; I can't even count that number of times I've converted a 'Cocker and immediately sold all the pneus. Not anymore.)