After 40 years, I'm cutting back and letting the young bucks take over, however, I still have a head full of info that I'd like to share. This HVAC forum seems like a good place to be. How many times over the years have you had to SWAG your way through field problems, and now you can go to a forum like this and ask colleagues for help. No matter what your skill level is, you will get stumped. How many times have you starred at the ceiling at night thinking about a problem? This forum is the answer to many sleepless nights. I do have some reservations about some members that have extreme knowledge to be more polite when answering questions. This is not a test of skills but a forum to share. Go in peace.