heat shrink techflex both in either normal, exotic or uv colors. cheap enough heat gun for it if you do butt connectors, i'd say get the ones that solder the wires together.. Everybody has a local shop that sells connectors cheap already. Stocking those would be different to many people that have never heard of them. aero flares and\or pipes? set screws for amps allen wrenches for amps The extremely cheap $1-3 china volt meters soldering iron with proper solder and flux Material used for properly reconing that is not given with a recone (IE- centering the former, etc..) flexible conduit. I use it to run cable under the car. Might be a bish to ship though.. tap and die set crimpers for small and large terminals.