My E-140 Wood Gun will be arriving soon and I'd like to get started off on the right foot. The closed system I'll be using takes about 80 gallons to fill. I will not be having any other storage. Should I use distilled water or try to treat tapwater? I know it's important to have the right "mix" and I'd like to know what any of you do and long term results of your techniques, i.e. corrosion, sediment, etc. Thanks