A few months ago I found a used Heym 88 B Safari in .458 Win Mag for a reasonable price. I sent it to JJ Perodeau at Champlins to convert it to a 450 3-1/4" NE. In addition, I asked him to add a spacer and new recoil pad to increase the LOP to 15-3/16", add a mercury tube to the stock, machine the grooves into the rib for an RMR mount, remove the cast in the stock, bend the triggers to be more friendly for a lefty, replace the front sight with a pop-up ivory sight, then re-regulate the barrels for 450 grain North Fork FPS. I shoot left handed, but my boys shoot right handed, so in an attempt to get a rifle we all could use, I had the modifications above made. I received the rifle back Wednesday of this week, and it looks like JJ did everything I ask! Unfortunately I don't reload, so I'm waiting on ammo to be loaded to the same specs JJ re-regulated with. I can only hope the rifle shoots as well for me as it did for him (proof target shown below).