We offer an advanced equipment course at our dive shop as many do in our area. Its a fantastic course for new and old divers alike; learning how to do daily maintenance to their own equipment to help protect it as well as increase its longevity. However, if Im doing either a DMT lecture or teaching an equipment course, I go out of my way to inform the divers that what I am teaching it is not going to make the a technician. This is important because I have seen too many divers try to service their own kit after a simple lecture and find out they did more hard to their equipment than good. Find out what band of equipment youre going to want to service and talk to you local dive shop, Im sure they will help you out. Cheers! N have fun with that retirement.