Ok I have agreed to change the cylinder head Gasket on my mates 1.2 16v punto. I have done this a few times on the 8v engines but never on one with the 16v head and am very aware of the fact that you are ment to use the correct cam locking tools that i do not have access to. My plan was to make lots of tipex marks and not loosen of the bolts at the ends of the cam shafts. But I cant decide as some people say its fine to do this and others say its a big no no and you must use the locking tools. My last option is to follow the guide in the holly Haynes bible and get my mate to machine some lock keys up as he works for an engineering company. Does any one have any exspierience either re-timeing or changeing cam belts on this engine thanks in advance.