Try doing some of the PS3 controllers I've done and tell me it wasn't challenging.
Yes a Voltage Regulator, a Diving Regulator isn't going to do you much good, unless you plan to mod it to play games under water. (IMG:
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People have done PS3 mods, they just aren't as popular and it depends on what the person wants from it as to how far they go with it and then if they feel like posting it all over the net or not. I do agree there is little info in the realm of what voltage spots are where, but you can mostly blame Sony for that as they make revision changes one after another and nothing stays exactly the same really. The Phat and Slim aren't the same, so there's already 2 different setups to deal with, so it can be a real pain to keep up with that mess.
If you're already that impressive with the PS3 one would wonder why you'd want to do anything to it, but if you're going to then you should get yourself a DMM of your own to check for some things like this, not all info posted on the net is what one would want to take for granted, plus it's a handy tool to have around for more than just looking for PS3 voltage spots.