Where it moved, I never managed to go back and finish the rim as I'd wanted to, the best I could manage was hand sanding after a very careful cut to at least tidy up the inner rim.
It is now finished, oiled and waxed but a large crack has now travelled through the rim and it's definitely not sitting 'square' where all the movement has happened, it's 'resting', currently, I'll post the finished vessel later.