Nice welding !!
Everything needed is housed in the booster itself, so separate sensors or ECU is not required. For a standalone application it uses a battery 12v with 40amp fuse and ground, then an ignition 5vDo you know precisely how the iBooster works? Like what inputs does it work off? I can imagine it having its own controller and modulating boost based on circumstances, i.e., sensor inputs.
Nice digs! Is that CPU water cooled?