SPUSCG, I think what kraigwy means by "cocking the gun 15 degrees right" is that he is strongside eye-dominant, so he rotates the gun's vertical access inboard, toward the strong eye when he shoots left-handed. I've seen this technique taught with good effect. I use it, to some extent.
As far as recoil control goes, are you making sure the barrel of the gun is aligned with the long bones of your forearm when you shoot lefty? Are you getting a high grip? Those two factors can really bite you when it comes to recoil control. If not aligned with the long bones, the recoil and muzzle rise work against the drumstick of your thumb instead of the web of your hand.
Otherwise, I'd recommend lots of dry fire with the weak hand, same as you probably already do with the strong hand.