OK...
Checked around locally for a shop that could do ultrasonic cleaning, no luck. Found a rad shop that can do boiling acid dips but they wanted $100 per rad, I politely told the guy he was out of his mind.
So, I've done the vinegar full soak for 30 min, drain 1/2 and shake and rinse, used 4L total, baking soda mix 4 times, isopropyl alcohol, 3 bottles worth and more hot water shakes and got them to the point where a distilled rinse looks crystal clear. No flux skim on the surface and clear water...GREAT!!
But...and it always seems there is a but with these

rads, when I leave the 120.3 empty overnight and rinse the next day I get flux like I was just starting. Two rinses and I'm back to clear but I'm

and at the point where I have mounted the rads and if they

my multioption I'll just replace it and the rads when I redo the loop for the X58 install early next year