Also, when I hook up a power pack to this, will i still need to run the regular power pack into the back of the Amiga itself or will the Amiga be powered via the Mediator?
The mediator has a psu connection on it and this should power the whole system, but i may be wrong looking on amigakit it has an AT psu connection so i would think that it should power the full system from the mediator.
