I have never heard of the EAW mounts before, but just looking at them briefly, they look to be the same design as the optilock. I have had decent experiences with optilock before, however, this rifle is a 7 mm rem mag and after a discussion with Richard Near, I've come to the conclusion that the design used by EAW and optilock is not ideal for a heavy scope.
I am going to try the valdada bases epoxied on, if they give me trouble I will tap the action to accept a rail. The epoxy (G-Flex) seems to be holding the bases on pretty well. I tapped each of them with the weight of a hammer from a couple inches away a couple times and they didn't budge. Recoil would apply force in the opposite direction that I tested with the hammer. Obviously, the valdada base design is using the same concept as the NEAR rail.