[William]

Thanks Craig for the kind offer, I wish we just lived a bit closer to each other. If you do want to sell your valve tester I'd probably be interested. I only have a budget of £200 - £300 which may not be enough looking at current prices on the Internet.

Seems that valve testers in the USA are much cheaper and more commonly available. But likely would need a step down transformer and a chart to convert our valve numbers to their equivalents.