Charles,
George Armstrong Custer went into battle in Montana at the battle of the little Bighorn very imprudently. He was outnumbered VERY heavily, was on their territory, was more vainglorious than brave and his bluster meant that when he realised how bad a situation he had begun then it was too late and, for him, there was no way out. Having made his name in the American Civil war, especially his propensity for showboating as much as anything else, he felt he was unstoppable and unbeatable and for him this made it very difficult to retreat.
Have you ever had eerie, depressing feelings when you visited Culloden? If so, that was the eerie feeling I got years ago when I visited the battleground. Stark open country, low clouds and bleak as far as the eye could see to yonder mountains. Which gives Montana the nickname of "The big sky country".
So I hope that the devolutionists think deeply about all the aspects of separation very carefully and determine their fall back positions before they move. If they do, I think getting out from under and away from Westminster could be a very good thing for Scotland.