Hi Matt,

There are scripts already available to find gaps, as I said I knew that trim 'artefact' means that something had a gap so I used the Select Naked Edges script http://kyticka.webzdarma.cz/3d/moi/#SelectNaked

There's also a command Michael cooked up to mark the end of a curve with a point if it shows that the curve is not closed and you can't see the gap http://moi3d.com/forum/display.php?webtag=MOI&msg=2888.11

~Danny~