Hi ram2048,
Thank you for not giving up with my system.
The internal changes are series of single steps of addition or subtraction operations, where each step changes the internal symmetrical degree of the given Natural number.
In the external world of N members each - or + operation is changing the quantity.
In the internal world of each given quantity, the quantity itself remains unchanged during a series of single steps of - or + , where each single step changing the internal symmetry of the given quantity.
But the given quantity can be changed by these single steps when:
a) A single subtraction step is operated on the most symmetrical state of the given quantity for example: (1,1,1,1) - (1) = (((1),1),1).
b) A single addition step is operated on the most non-symmetrical state of the given quantity for example: (((1),1),1) + (1) = (1,1,1,1)
The internal operation steps can move only by a one and only one step for each move, which is not the case in the standard external moves that cares only about quantitative changes.