Does the expression no more no less make sense? For example:
It's easy, do that, just that, no more no less!
It's easy, do that, just that; no more, no less!
It's easy, do that, just that - no more, no less!
Another way to break it up would be to use a conjunction: 'no more and no less'. If you don't separate the two in some way, then the reader or listener will expect different syntax - like 'no more Mr Nice Guy' or 'no more school'.