Indeed it's only a minor change, but it takes still more time than to flip a switch.
In any case it's nothing you want to do under fire, so if you get a right-hand configured weapon and are a leftie you'd better shoot with the rifle on your right shoulder.
Since this problem is common with all side-ejecting bullpups it's a serious drawback in design.
In Austria the problem is solved in a typically Austrian way: everybody shoots with the rifle on the right shoulder - though also the StG77(aka AUG) can be configured for a left handed shooter.
BTW1: No one answered my question why the AUG is so unpopular here(apart from Gryphon and ShakKen not liking it..), ****, I pose this question for over 1 year, but still got no real answer..
BTW2: the FN F2000 is a butt-ugly rifle..
Snakeye