Raideron, that was the GP mount that came with the plane? Just checked UPS and my Magnum is at home waiting for me. I am pretty sure it will fit further back in the mount than my OS so I am not sure if I should redrill the current mount, get another mount just like the one that came with the plane, or get a larger 60 sie mount. I would prefer to not have to redrill the firewall if i dont have to.