Thanks for that. I have a pair of bike shorts that are losing some stitching. they have two lines of it round the waistband, one above (?) the elastic and one below (?) it. the one below is unravelling and i was going to try and fix it. I was going to sew (machine sew) through the elastic when it was stretched , but maybe this isnt a good idea? Any thoughts you might have would be welcomed. I'm reluctant to lose a pair of shorts i might be able to fix without too much trouble.