I have several great patterns for sweaters that are meant for a heavier weight yarn, such as wool. Knitting to a gauge of about 18 sts/4". However, I want to use some of the beautiful pastel colored cotton yarns that are in a local yarn shop. But they are lighter weight - about 21 sts/4". I can’t find any heavier weight cotton yarn. Can I play around with using large needles to make it fit the gauge of the pattern - or is there some way to adjust the pattern to fit my yarn? Or am I just wishful thinking - and asking for trouble. Does anyone know where to get heavier weight cotton yarn?