You can help avoid overfilling by putting a short tube in the "fill" inlet. If it extends down two inches into the tank, for example, when the fuel
gets that high it will bubble back in the neck when you are filling it, leaving some airspace for expansion in the tank. And you'll probably hear the tone of the pouring fuel
change as it nears the neck.
More problematic is the aluminum
tank, it doesn't do well in salt
air. It will show white corrosion
and pitting within the first year and not look pretty at all, unless you have that tank anodized or put some kind of protective finish on it. Anodizing isn't cheap
, but gold anodizing would make it look sort of like shiny brass.
Might be cheaper overall to buy a brass or stainless tank, even though both of those might still benefit from some protection or polish.<G>