Hi mickey,
as long as you don't use styles,using the OTS is not a good idea.
How do you like to find the style with your favourite OTS and then moving to the next style with the other OTS etc?
Instead of the styles you could find the registrations.
8 combination of voices for each bank.
You can easillly have acces to regs by pressing the letter "J"and the white "+" and "-" buttons above the keybed and the foot pedal will moe you to the next reg.
Make a folder on the usb and put every reg in there, or if you have enough free space that you don't use, save them at the user area.
To transfer the voices from your OTS's to the reg buttons it is quite easy.
Press the OTS button,then set to disable the ACCMP,Start and Auto start button and then press Memory and the Reg button.
Just remember to uncheck the style before you save your first registration.
When you have done with all the 8 reg buttons(or less if you wish) Save the registration.
Then move to create a new bank of regs.
Before that test the first one to see if it works fine.
(To test a reg we always must load another reg and then go back and reload the one we want to test.This step is very important).
You can name the regs either by the songs you are playing or by the genre of sounds they contain or anyhing that helps yu remember what's in there.