Walter Martin, the founder of CRI, died in 1989. We all know this, but I have Dr. Walter Martin's book on cults, which SDA are, and it says the same thing. Please do not bring up the Handegraaff thing to discredit the author of this fine article.
This is about Keeping the Sabbath, not about Eastern Orthodoxy, so please do not try to hijack the discussion for your own purposes.