To Customise your NSC groups head into the Advisor Tab > Valuations > Settings
In this window, on the left hand side, you’ll see the custom Default groups – press the “Customise default groups” button down the bottom to make changes as you see fit.
To see the stock classes and other info that make up the group click the + sign beside the group name and press – to collapse it again.
Here you can add and remove the stock classes as you see fit. If you want to add your own group just click the “add group” button.
For Mature Classes you have the option to choose the Immature Group it looks back to and edit the stock classes that include deaths and sales in the “Surviving Quantity”. If you wish to delete a group just click “Delete Group” in the bottom right hand corner.
The tool will warn you if you have not allocated a stock class to a group down the bottom
When you’re happy with your groupings just press "Save"