hi I made a shroud for the regulator ( copied the one from the lighting kit ) and fitted it with a piece of cooling tube from the front duct and all seems ok now I think that even though vans say you only need it if you fit the lighting kit that it is a good idea for all installations as if your battery gets a bit flat the regulator is going to work flat out till it is charged also my supplier said tempurature is a quick way to destroy a regulator