Well made, but does not sit flush - Evolution Gun Works HD Picatinny Scope Mount, Ruger

I recently purchased a Ruger No. 1 in 45-70 and wanted a picatinny rail to give me enough elevation to mount a 50mm Objective scope. The first problem here is that the rear of the rail DOES NOT sit flush with the barrel. All the holes line up correctly, but the rear of the rail does not sit flush with the barrel (can see the screw and light when looking under the rear of the rail). This was supposed to fit the "S" designated barrel, that is why I purchased it. Another thing to be very careful of in general when mounting any scope on a Ruger No 1 is making sure to get that scope back far enough to be able to see well through the scope without climbing up the butt of the rifle. Many variables come into play with mounting scopes on Ruger No. 1 rifles. My biggest bit of advice is to purchase off-set rings and no larger than a 40mm objective scope (bell of scope can hit the barrel, and you may run into issues with running out of elevation adjustment if the scope sits too high off the barrel). Purchase one with as much eye relief as possible and mount that scope as far back as possible.