My proto also seems to be a bit rail-high. Having bases be a bit rail- or base-high is not really uncommon and is easily solved with a base grind or edge-bevel.
Some boards ship with 1/1 bevels, NS's are a flat 0/0 so u can do whatever u want with it, I've heard of a few NS's being like this before a tune.
Support Local Business
"Shop Smart. Shop S-Mart!" - Ash