Greetings. As I am about to leave Chicago and a corporate career for new studies and diving in Cebu, I signed up here for some input on today's dive world. I got certified in the mid 90s and dive intensive for a few years until family and work took overNow my world is changing and diving is once again taiking the lead. I signed up to learn more about rebreathers..Have a great weekend- it will be my last weekend in Chicago.