Amkee.....Please ask all the questions you want. Just keep in mind some people are just act like "peckerheads" because they think they are are God’s gift to the diving world. i’m asking, as one of the mods on here, to please continue you quest for knowledge and dont let people like that turn you off of this site or the sport for that matter. If you feel you must, ask one of the mods or pros on here.