Alright, I am deciding on buying the W1 Pacific water block. So, I will need to buy new fittings. The only question I have now is, "does anyone know the outer diameter for the green coolant tubes that come in the Bigwater box set?" All the specs I have been reading only state the inner diameter as 3/8 9.5mm, but in order to use the pacific, I will need to buy fittings that utilize both a minimum and a maximum diameter.