Tommymo,
I noticed you mentioned you would have the G-3 set between your Frankie and your Ogre Pearl....in my opinion, your G-3 should sit outside of your Ogre Pearl.
The G-3 is one, if not the most, skid/flip ball they've produced in their lines to date. Sure the Immortal flares alot, but the cores are completely different and the reaction and hitting power of the G-3 down the lane is better than the Immortal.
I believe that you will be fine with the layout you figured, 4 1/2 at 60, I would maybe even go as far as 75 degree on your drill angle. The G-3 at stacked (90 degree drill angle) can be a bit touchy, but kicking the CG a little will help get the ball into it's roll a little better.
What are the layouts on your FMG and OP? What surface do you currently have on these balls??