This is how I normally set up my arsenal of bowling balls.  I will usually keep the same pin position on all my equipment and just change the CG location and add or not add a balance hole.  I let the cover and cores seperate the reactions.

Even using the same pin position on all my equipment each ball still shows it's own characteristics.  A strong mid-lane ball still will show it's strong mid-lane compared to a ball that has little mid-lane.  I think you get the gist of what i'm saying.

I don't use asymmetrical bowling balls very often.  I have had some good success using the pin above the bridge on asymmetrical equipment but have learned to not place the MB to close to the thumb as it creates a reaction that's hard to control.  I'm sure they same rules should apply to MORICH asymmetrical equipment?