Hypersmurf
Moderatarrrrh...
Bad Paper said:Monkey Grip: "You are able to use a larger weapon than other people your size..."
Right. Monkey Grip lets you use a weapon one size category larger than you without increasing its designation (light, one-handed, two-handed), with a -2 penalty. It doesn't make you one size category larger, or even effectively one size category larger.
And Powerful Build doesn't treat you as one size category larger for the purpose of wielding weapons; rather, it allows you to wield weapons one size category larger than you without penalty.
A Large creature can wield a Large two-handed weapon, or a Huge one-handed weapon (treating it as a two-handed weapon).
A Medium creature with Monkey Grip can wield a Large two-handed weapon, but he cannot wield a Huge one-handed weapon - the feat has no effect one weapons designed for creatures two size categories larger than himself.
A Medium creature with Powerful Build can wield weapons designed for Large creatures without penalty, but the trait has no effect on Huge weapons.
A Medium creature with Powerful Build and Monkey Grip can wield weapons designed for Large creatures without changing their designation, and do so without penalty... but neither the feat nor the trait have any effect on Huge weapons, so while he can wield a Huge light weapon (as a two-handed weapon), he cannot wield Huge one-handed or two-handed weapons.
-Hyp.