from the console... I'm so dumb.. thanks mate*bree.sub.max not sub_max, it's defined in the class_stat script in game\cl\class_stat.rpy.
I'd just do it in game by opening the console, first changing the max with something like "$ bree.sub.max = 75" then do "$ bree.sub = 75", I supposed the dollars arent even neccesarily since console should be python...
I would NOT recommend doing it from start as it will disrupt several events that are stat-specific, I just do it when I'm done with other story stuff going foward.