Bad idea to even think of that on a Darne, or, a Charlin, Jack. I have discovered it is just about impossible. But, don't take my word for it-talk to JJ at Champlin, down in Enid.

Better to get the gun with stock pretty close to what you need, and call it good. While I've heard Darnes called many different things, over the years, flimsy isn't one of them.

With proper torque on your head, maybe we can get you bent from right to left, eh? Might work out better, long term....
Best,
Ted