Hi Robin
Thanks for sharing the Daimler Ferret Useful info web site
http://www.ferret-fv701.co.uk/useful_info.htm I had never seen this one before. Who ever put it together has put a lot of effort and time into a most interesting and informative web site regardless of if you have a Ferret or not.
The comment about the fuel tank design leaving fuel in one side unless you change over the fuel valve reminded me of Rider Rental a truck rental company in the states at one point modified many of their trucks with saddle tanks by putting a small cross feed line between the tanks, reason too many service calls trucks stopped by the side of the road with a fuel tank of fuel. Of course the engine was using the other tank. I've heard of the same problem with motor cycle tanks which have the same saddle configuration and the same issue of collecting dirt and water in one side if both sides are not used regularly.
Keep us posted on your progress.
Cheers Phil