Hi Guys, I have almost finished soldering the PCB's of the sammichSID and I will shortly perform the voltage testing. I have got the following questions regarding the power supply. a) I have planned to use a 12V regulated power supply and I wonder how the polarity has to be ? Is the center positive or negative ? b) I will use 8580er SID's and I suppose that the 12 V power adapter is ok, isn't it ? I assume that the 12 V are broken down on the voltage regulator and if the jumper is