I have a lovely sauer 3000 drilling with a SEM montage and a 1.5-6x36 diavari on it. I have been looking to put a picatinny rail on it so I can get it lower with a 1-6x24 scope and go back to using my aimpoint on it. Has anybody done a conversion that can put a low detachable picatinny rail on a drilling with an existing SEM montage base, or recommend a cheap alternative. I still would like to see down the rib with the flip open sights for shotgunning hence I don't want to just bolt a picatinny rail to the top of the rib.