This morning I cut open the steek for the second sleeve, and took a video while I did so. It looks like the last video update I did on this sweater was a year ago, and there were some comments in between asking to show how the steek is cut.
I apologize for the poor focus - I had the camera to my left side, which meant I couldn't always see the screen to see if I was in focus! But I think it's clear enough to give you the general idea.
So you see - nothing to fear! If fear of steeks has kept you from working a Fair Isle sweater, fear no more! If it's the massive amount of work involved though - well, I'm afraid there's no way around that.