Thanks, Gents.
We are using an electronic mass & balance computer, which has default catering configurations for 'normal' and 'nil.'
Because one of the aircraft is a DHC-8 400, with a straight wing and fairly long arm to the aft galley, there are significant index shifts when comparing a full with a depleted galley. (6.5 index units shift, with an operational envelope protection of 3.0 units)
We have several solutions on hand, including an further operational envelope restriction or more catering configurations (FULL / HALF / EMPTY).
Appreciate the inputs.