Yea I will post some Pics Tomorrow. I still have to weld up my tank ( 3 gal aluminum ). Just got the weld on bungs in the mail today. I was side tracked by an infection and 2 weeks in the hospital. And really need to finish my welding table ( Strong hand clone with 1-3/4 spacing on the 5/8 plates so I can use their clamps that fit that 1-3/4" gap.

I myself am up to about $150 in parts now also, are you using a pressure bypass valve to control the pressure? I got one that will bypass from 25 to 175 psi from McMaster Carr . I think it was around $40 That and all the brass fittings increased the cost quite a bit. I also reduced the inlet and outlet to 1/2" right at the pump which will limit the pumps ability to reach maximum pressure a bit I would think. And also the 1" brass was big $$$. I will take some pics tomorrow I also have to plumb in the radiator and the heat sensor Tee . I will run that to a relay to shut off the pump when the water coming out of the heat exchanger (radiator) drops below 100F.

any way .... Pictures tomorrow. Btw I plan on making a stainless cabinet to enclose the works Ala Delorean LOL

Cheers