Ended having to repay a gunsmith to re thread all the screw and attaching original benelli rail. Attached a insight mrds and sho about 30 rounds today and it held up like a champ. Just bought the esstac shotgun cards and gonna use that as my sidesaddle. My buddy has same and he warned me about the mesa stuff. Urbino stock grip is still kinda loose but that's minor in comparison to other issue.
i warn everyone, stay away from the their side saddle. I know some people have had luck with it but I wouldn't take the chance. Because of their shotty product my expensive shotgun had to be re tapped. The shot gun cards with Velcro work great, they are cheap, lightweight and just more convienent.