I just installed a set of Ashley sights on my .444 Marlin. I saw the article in the American Rifleman a month or two ago on the .450 Marlin, liked the set up and bought the whole thing. I have had two Lyman peep sights (Model 57) fail due to recoil; both of course, days before a planned hunt when I was making my last minute checks. I bought the Ashley ML-0014-5 Ghost Ring set. It did not require gunsmithing. It came with very detailed instructions. On my Marlin I have four screw holes on the top of the reciever for a conventional scope mount. The Ashley rear sight has a pin that goes in one of the rear scope mount holes and a screw that goes in the other rear hole. The front sight required that I remove the two screws holding the factory ramp in place, remove it, and simply screw the new one in place. They are very big on using Loc-tite on everything and include it with the sights. I also installed the Ashley Lever Scout Mount which is a scout scope mount. It has a piece that is drifted into the dovetail exposed after drifting out the factory rear sight. The rear of the scope base is secured by the two holes in the reciever originally intended for the front of your scope base. I am awaiting delivery of a Leupold M8-2.5x28mm IER Scout Scope. I am going to mount it to the Ashley rail using Leupold QRW low rings (these are quick release rings that fit a Weaver base). This will enable me to remove the scope and use the ghost rings if and when I want to/need to. You are, of course, supposed to be able to then replace the scope on the mount, secure the two levers of the rings and have the scope return to zero. I have found on my Remington 700 ML that this is not the case, but it is fairly close.