@vheflin thanks for the info. I have read through about a quarter of the posts. Seems I would have to submit this and pay for a reholder, as I don't think CGC would see the Newton Rings as excessive. I noted my displeasure with the seller for not advising of this, but I see that it may be a common occurrence. Frankly, new to this process, I am somewhat underwhelmed by CGC's response/reaction to this issue. When I look at this slab, the newton rings are all I see. It definitely takes away the pleasure of owning this book.