[Windflier]

...we have the most to lose, and the first to be attacked, because we’d be immediately successful.

This isn't the nineteenth century. The fedgov isn't going to militarily attack any secessionist state. If we go, it'll be in peace - just as nearly a hundred other new countries have done since the end of WWII.

[HiTech RedNeck]

Assuming the successful disentanglement of Federal this, Federal that, Federal the other. The Civil War shooting began over a handful of Federal installations located in the seceding states. I can’t see how to undo that.