Portable Backpack Droid [Tensen01]

So, I'm working on a Star Wars RPG pilot/vehicle specialist and I wanted him to have a droid companion. The problem is most droids aren't terribly well-designed for fast movement or portability.

So the idea I had is a spider-type droid that can be worn as a backpack. It's 4 legs act as the "loops" to hold it on(They attach to points on a vest so they don't have to connect). It should have plenty of concealable "arms" to manipulate or repair things with, as well as a small place to carry small items such as a couple grenades or first-aid kits.

I'd prefer if, when worn it's kinda folded up a little bit and doesn't necessarily look like a droid, more like a high-tech backpack. Once it's off it unfolds and can walk around. It should be about the size of a standard backpack.

I've tried to draw one myself, but I'm not too good at the technical type artwork.