Quote - you can not select the chest and make it bigger.

 

i only created full body morps. so you can only use the morps from the full body.

But he CAN select the chest on M4 and make it bigger, hence the breakage since the suit wasn't designed with all the INJ morphs included for each body part I'm guessing. If he wants the suit to not break he needs to use M4's FBM's only. This seems to be where communications has failed.