As Scotty said '' She canna take it cap'n '' The valve on the left, which is quoted as being 100% healthy, has in fact been to more different worlds than most, it's done warped Hyperdrive one too many times. Seriously though, it has what we call ''red plated'' and she couldn't deliver what was being asked, so much so that the plate wall has even deformed. Apart from the fact I'm not entirely sure they are even Mullards lol. Go careful out there guys. https://www.ebay.co.uk/itm/mullards-el34-xf2/274036546866 Sorry not sure how to extract pictures for future ref when auction finishes.