My suggestion is based on 2021 conditions for restorers, as the original factories, tools, workmen and materials are long gone and cannot be replicated. No one can make a living as a bike restorer, it is just a hobby of folks who like the old timers for what they offer. You can take any 100 point restoration and find one or more deviation from the original, so lets have some fun with a great hobby and recognize quality where it exists today.