Although I would put it on a test ball first, the rico drilling is definitely worth trying.
I'm similar to you, PAP 4 5/8 x 5/8 up, slightly speed dominate.
I rico'd an old Dynothane Vendetta 44 Magnum last summer just to try it, and that ball has since became one of my favorites - very even reacting and smooth, expecially on sport patterns. I say give it a shot!