Yeah, I was down at MaCains a few years ago to check what I thought was a freon leak at the lower condenser connection. They moved awhile back from near the Mazda house, to Floyd Cr, behind my 2nd home-TI. Had them sniff it and they found nada. Turned out to be a slight front crank seal leak, throwing a small bit of oily stuff on the AC pipe. They're still really nice folks.
But, I'd prefer to do the legwork myself if I can, that's what retirement for a gearhead is all about.
Drove it around today, vent temp hit 44 degrees. Guess I'll let it go until it clogs again, and then I'll feel pretty sure it's a restriction, and go for it.

Thanks for the inputs,
DG