I'd have bought it if not for price

and I hate plastic tanks...
I am sure it looks OK - I agree, can't judge by photos, but then I am sure it looks OK, otherwise they would not had it made for Storm...
I experimented with plasticine on top of original tank - and I easily ran out of 6 kilos of it putting it on...so I guess that's roughly 4-5 liters of volume...