Hi ezdzd.
Thanks for the compliment. The rear tank is off a 1950's Villiers stationary pump engine and is approx 1.2 galls imp. Needed a bit of de-rusting but fortunately was in a good condition. I decided I needed an extra tank as I live in a rural isolated place and filling stations are few and far between. With the two tanks I now have a range of rufly 460km's.