The plan to tap the coreplug at the back of the cylinder for a water takeoff has hit a snag. Rummaging through the XFlow core plug set, non off them are small enough! The problem is that the alloy head uses a different size of 1 1/8". A WFSE (world famous search engine) search came up with http://www.coreplugs.co.uk which seems to stock every size and type of coreplug. The job list has actually got a bit longer, as I had forgotten that I also need to find a home for the temperature gauge sender.