Xfire fan,

I thought of that while doing some updates on the design... so here is version 2!!!

Basically I slightly widened the openings in the main tank by a 1/8th wider to 2 and 5/8th of an inch. I also made the overlap on the freeze tank lips wider for better sealing. Lastly, I shrank the length of the freeze tanks by a 1/8th of an inch to 5 and 7/8ths of an inch. This will give good thermal expansion variance for the freeze tanks vs. the main tank.

Also, I would suggest using Aircraft fittings instead of simple bungs for the inlet and outlet. Just weld on Aeroquip base 35 degree fitting bungs to the tank. Then you just put proper fittings on your hose and it's easy-sneezy...