RE: Welcome to Club SAITO !
People, while trolling the RCM plans site I came across the old Saito Engine book that I always use as a reference source. They say that it a copy of the original but that should not be a bother.
Over the years it has been a tremendous help to both myself and others that I have acquired it for and I would heartily recommend it to any one who owns a Saito. I suspect that it won't have the modern engines but it does cover (or at least mine does and it is 10 years old minimum) most of the engines in use today