Tomb of the Cybergun

[Davros Skaro]

I can tell you that the "coils" on the front end is actually flexible conduit, you can get it in lost sizes & either from an electrical supplier or a hardware store. better still if you know an electrician, he may "give" you the small/short length you need.
your doing a great job on this, keep up the good work & all the best with it. 

Chris.