Hi Jarlath!

I use the same SW version as you do.
You cannot customize the voices for each style but you have the following options:
• Each style has it's own style setting (there's a button with the same name to enable it) – these settings are preprogrammed by Ketron but what you can do is to take a setting from one style and assign it to the other style (you have to check style settings of different styles on your own and find which one contains the sounds that you need) – you can save the enabled style setting button with the registration
• You have 8 sound banks under 1 TOUCH option – here you can customize all 8 banks with any sound you want, then you can pick it up with a style and save it in a registration
• PROGRAMS are useful if you need up to four sounds at the same time on the keyboard. I forgot the number of available programs but again it is a limited number, you customize the programs and then save the one you need in a registration together with the style

There's one thing to note when you call up the registration – I forgot if it is with 1 TOUCH or Style Setting option but after the registration is recalled the sounds do not show on the screen, you have to disable and enable 1 TOUCH or (Style Setting) button to get the sounds on the screen

I hope this helps.
Best regards,
Luka