Hehe, thanks alerum68. I'll check that.
@Willem
What I propose is totally possible with SDK, int fact it's a breeze, just a simple setter function and we could read player's choice and update unit model accordingly in real time. It's not to increase the unit's group size by OUR judgement, it's to let players choose how many units model he/she would like to see with the game's unit. So the performance issue is not a real issue, since it's always the PLAYER that make the choice, if player feels the game become slow, he can always choose to use smaller group size, even two models per unit, that will be smaller than original BTS. This user choice is why I propose it to go with BUG.