Fellas,
Great, great stuff. Let me be clear, though; I don't have duplicates of engines, only freight!
Secondly, to those who "don't see the issue," I would offer this: "Plan carefully and you will have plenty; if you act too quickly, you will never have enough." (Prov 21:5). That's the issue.
As a result, I'm going to downsize the collection a bit, and get back to runnin' trains.
Sounds like you're back on an even keel - good!
I have only acquired what I could realistically fit on the layout (and I do not have a roundhouse or engine storage facility). Engines that are not currently pulling trains (I only have 6 TMCC locomotives) are parked on sidings or in yards. I am perhaps helped by the fact that I am interested only in Pennsy steamers and that they should have appeared on the PRR Panhandle. The other limiting factor is my O54 curves - they keep me from acquiring big or articulated steamers.
I do own some duplicates of freight cars, but have worked to thin the herd a bit over the past few years. There are way more cars than can fit on the layout.
I think it's a gradual thing that comes to all of us eventually. We decide to focus on the important and discard the rest.
Best,
George