I don't have anywhere to put petrol in anymore. Seems I've left it a bit too long between fillups and something sticky has 'got' my filler cap lock. It turns but JUST insufficiently for the key made of butter to get the jaws to release the cap. I'd better get myself a kwak blank and get a spare cut before I ruin this one. I took a set of allen keys to it and persuaded it all off as an assembly fiddled with it and stuck it back together. With no change to the end result. What do idiots do in these situations, except hop on the tube?