Just when we think we know it all - guess what!!
I am so sorry that you "found this out". I thought I was the only one who did this. :(
I (although this is a recent discovery) have found, whenever I think I can go for the short cut, that I am SO wrong. I now measure once, twice then three times, cut and then sew a HST at least 1/4 to 1/2 inch larger than I need so that I can trim it down to size. Ask me why . . . :oops: