As may be imagined, I would suggest, with some trepidation, that you might explore gunfit as a possible solution.
And in just what way are you struggling vs/ how you shot pre-CG?
As to the high rib thing - the only rationale that I ever heard for them that seemed to make sense was for OT doubles. The DTL application has always seemed iffy to me, but I'm just a flat rib guy and WTF do I know? I'm pretty limited talent and skill-wise so rib height is meaningless to me. I shoot them all the same.
High ribs do look way cool tho
besta luck
Charlie