Which one are you looking at? The Recknagel, that NECG sells, is the "top of the line". All require bolt mods, best left for someone familiar with safety installations.
What I ment was, what model of safety are you thinking of using? I'd rethink putting a swing safety on a Model Seven. The Model Seven is a reduced size 700, basically. As such, a swing safety will be (and look) out of place because it is sized for the 700. It'd be a big safety on a small, scaled down action.I've got a Model Seven that I'm thinking about putting it on.