I'm Harold I have come to this site for some time just reading some post. welcome, you do know where the best info can be obtainedI have been in HVAC since 1991. Oh goody, you can join the gruppy clubTrained by Local 72 Plumbers and Pipefitterssorry to hear that here in Atlanta GA.
no that's not a stab at #72, don't have a clue about them, but more a litmus test
It`s better to be silent and thought the fool; than speak and remove all doubt.