Last night I sewed on the collar.
Then I unpicked the seam and ripped it back off.
Just about everything that could go wrong did.
First of all, the underside got caught up in the seam, not by a lot but by just enough. Just enough to make you sit and look at it carefully to try and determine if there was an easier way to fix it then to rip out the entire seam.
But then, horror of horrors, I realised that the lapels were not the same size. One was wider than the other. This was not due to the placing of the collar, that I had checked carefully. It was due to the way I had folded back the lapels.
So out it all came. By the time I had finished ripping out the seam, my eyes and back had had enough.
I'll try again tonight . . . .