I guess I'm a grand-pappy now

[Alex]

craaaaap, looks like I'm going to loose a bit of capacity - have to put the vent fitting in now, and the realistic best place is on the tank, tot he right of the fill neck, just slightly above the fill neck. So I'll basically loose the top of my triangle (if it would have filled that high in the first place).

When it's done, when I clean it out once more I'll fill it up with water and see how much I hold. C'monnnnnn 9gallons!

 

[Alex]

dun dun dun.

And the answer is.....26 litres (7gal), assuming we define max fill as just below the vent fitting.

It looks like it would hold 30 litres to the very top, if I didn't have a vent fitting (since it'd be incredibly difficult to put the vent fitting at the top, due to the rear firewall that goes infront of the tank)

So I guess that puts the stock tank max capacity around 60litres, realistic around 55ish? (unless you can find some way to put the vent fitting on the very top of the triangle, as opposed to on the side/back)