Hi Sadlonelygit, if i'm not mistaken it's the second one, the grey one, thanks too Mike for that underseat info, the paintshop told me that may well be the code and will get back, they also told me they take lots of photographs of the job (my tank) then check them against a massive database before any work done. Thanks again fellow foccers, will let you know how I progress, what the tank looks like when finished! Tony