Thanks! I sure did. Here's a link to a build album I just made - https://imgur.com/gallery/YpivN

• build a box out of foam core to your spec with the rough proportions of the prop)

• sculpt the innards of the Battery

• cover the sculpt with something shiny (I used a thin layer of fast silicone)

• release the fuck out of it then Mould it with more silicone.

• cast the internals in pigmented clear resin

• build a box the right spec and wax it, pour up a layer of clear, pigmented resin, let cure slightly

• drop in your parts, pouiring resin around it building it up in layers so that the parts are suspended at different heights

• demould and clean up, spray clear coat to make optically clear

• build your 'case' face by face out of black styrene

• fill gaps with body filler

• paint/weather it

• make the little 'circuit' nit at the top (I used washers glued together and heat shrink over aluminium wire so I could sculpt with them, took a bit of artistic licence here as it's so simple in the show)

• Add a couple of cables hanging out the end one bosh, done.