Hi Arcitos, thanks for the feedback!
It was released in kind of a hurry, so I didn't get around to play test much - but the thought of balancing them a bit did cross my mind (mostly just lowering the number of slots to 5).
I think you're right, that the item is too powerful for the amount of effort you need to put into it. Including a chest and motor is actually a pretty good idea.
I'll release an updated version a bit later tonight.
Have a factorious weekend!