Apparently, they used to provide you with a small card showing tubeset, all the build info and dates etc, if you requested it, but you had to pay for it! Between £10 and £25 as well.
Don't know if they still do that though, must have had to hold a lot of info about previous builds.
I may look into that a bit more. May change the type of build I had in mind. Donald ( BJ Cycles didn't answer that question earlier )
Mike