Robotic backpack that adds additional arms

[Kotlol]

This is a really cool idea, I'd love to see more backpack slot items. Wouldn't it be trivial to just hold a backpack and fill it in one of the four arms though, if they can hold any item without limits?
Because then Johnny Robotlimbs has all the benefits of having a third arm, along with a backpack full of stuff.

Well the thing is.. it can be knocked out of your hands or you can drop it. That's the trade off.

Also by doing so you only obtain 1 extra arm and allows you to drop the bag by slipping, tripping and more.

So no... it shouldn't be OP since you are more exposed on losing your bag of gear.