I will share another trick I have used many times to help prevent broken ends. When you see a warp thread abraiding or unplying, get out your glue stick and give that yarn a little swipe. I swipe my finger actually and then my fingers swipe the yarn. Let it dry for a minute and then weave away…..nothing will happen to it now, you have avoided the dreaded broken end and the glue washes out when you finish the cloth.