We've seen more than one Fox here that has had a bit of trouble with cracking of the frame. I'd be tempted to just let it be, in hopes of avoiding that.
I've recased a gun, and while it was spectacular, it didn't shoot any better afterwards. Consider spending the money for some ammunition, some practice, a shooting lesson, or stock adjustments, to make it fit better.

Might help more in the long run.
Best,
Ted