Many of these forums are frequented by people who install this stuff -
any HVAC manufacturer who will sell to anyone limits what installers
can charge for their services. Don't blame these guys for being PO'd
at Goodman - anyone that impacts my wallet negatively is not a friend
of mine.

Yeah you have to get anything installed properly for it to function.
Will probably install an Amana high efficiency tube burner furnace when
I build - hey it is not a Goodman guys - ha ha ha. Gee wonder who
really makes Amana.