I dont want to throw any wrenches in any gears here...but, different power supplies work in thier own way..
I have 6, ranging from 10 amp to 500 amp. Each one is different.
Basically you want to be able to adjust the amperage setting. This will happen either by turning the amp all the way up and adjusting the volts or turning the volts all the way up and adjusting the amps.
Short out your terminals on the back of the PS with a heavy wire and see how it works.
Once you know which knob to adjust, figure out your square inches on the part, put it in the bath, adjust either knob to get the desired amperage and plate away!
As for other hobby plating sites......Stick with Caswell if you want to buy kits and stuff.
Stay away from HOBBYPLATING.Com....
I can say this because I have watched several people loose 1000s to them. They are Baaaaad..... (I dont get into throwing stones...but also dont want to see people ripped off!)
P.S. and im not even an affilitate!!!
48Buick
:P