I am sewing a sleevless, round necked top that is lined. I have stiched the neck and sleeve edges to the lining, right sides together, and want to turn it inside out and do not know how to do this. I have tried leaving one shoulder seam open and pulling it through here but must be doing something wrong as I land up with a ball of fabric! I copied the pattern from a top I bought and simply can't work out how to turn it so the right side of the top is on the outside - can you help?