I still have my fat-barreled 24 incher (Gen-2) and cannot bring myself to change a thing about it.
It was found at Great Northern Guns in Anchorage, late 90's just before the Gen-3 came out.
I hiked Crow Pass with it just to see if I could carry the weight on a little mountain walk.
I was younger then (sigh).
If the stock ever cracks it will get epoxy bedded and maybe a second crossbolt, visible or hidden.
Fluting of fat barrel with integral quarter rib might be messy ...
Reboring to .510-caliber would be perfect for a barrel that fat,
but I want not for another .510-caliber (sigh).