thought i had posted about it but guess not....
the preheat exchanger was already missing (froze before i bought it)
the other 2 were soooooo full of build up, i tried drilling it through, and popped through the coil

...after i made the booboo, i got out the sawzall and cut it...everyone of the tubes were full of shit...
soooooo only heat source is the helicoil, which is fine for me and my already purchased burner...the heli works well for furniture, or other light gpm apps...i think ill add back in the preheat one in the next few for before winter
but i can crank wide ass open on a 360 or rx and keep it at 230