I try to use exercise every component for an hr or so at least once a month or so.

If used very infrequently chances are it will fail prematurely.

Our toilet is a macerator I love it. We only have 1 holding tank, never any solids. If I run my electronic odor control(killing odor by electrocution of bacteria) I have NO ODOR regardless how I dump.

All the buses with a bath and 1/2 also will have macerator toilets.