I got new pins today - the Clover patchwork pins fine. They're 0.4 mm in diameter, instead of the 0.5 mm of the pins I was using before. You wouldn't think it would make such a difference, but it really does! My pinning is much more accurate, there's much less 'pull' on my fabric, and my sewing accuracy is improved by this. So happy I decided to listen to the advice I got about this!