put suit on, hold pocket where needed and chalk around it. Then take suit off and put masking tape along the chalk lines, helps make a neat job of things unless your really good at gluing within the lines
then glue the entire area with 2 part adhesive - beaver sell some this is ideal for the job, mix the whole pot together now put glue on the pocket wait ten to fifteen minutes (sometimes you want another coat) put them together and put a cylinder on them over night your pocket will never come off