Ok a final question of the night for any electrically minded people out there in Zapland. The power supply I got with the Zap is American 110v, so won't work here. I have a 12v 1a variable power supply at home (220v) with changable heads (so sure I'll find one to fit the Zap jack). Is this good enough and if it is, for the long-term should I just get a fixed 12v 1a power supply or doesn't it matter?