Tailoring a unit, character, or force composition to gain Minimum penalties & Maximum bonuses available within the game rules.
While not technically cheating, it shows a 'win at all costs' attitude which isn't conducive to a friendly game, & can lead to unseemly scrabbling through rulebooks looking for every last +1. Especially dubious when done at the expense of historical accuracy.
wonders why create different 3D models, if you can create one that can be customized?