No easy way, that is the most clear cut way to put it. I know theirs keys with simular positions, hell there the ones I play. I couldent help taking a long shot to pick around for some way to make sence of it all. You know really though, your singers vocal range is the factor for keys you really nead to learn so it all blends. I still get the need to practice keys in the twylite zones. They sound diffrent, almost somtimes like all new music Ive never heard. I just cant seem to remember the positioning the next day, when I sober up! THANKS FOR GOOD COMON SENCE ADVICE. Refreshing!