the p360 itself takes more wattage than a controller or a non p360 stick would. The dc has an issue with this and from what I know it works fine with the ps2. I dont have anyone in town who has a mas to test this but I heard the mas people use a different type of pcb for dc and ps2. So the mas doesnt work on the DC because it was a mas, not because it was a p360. I heard the mas people use a different kind of motherboard for their controllers because the store bought ones would break the copyright infringement rules.
I have friends who have p360’s and we play 3s on ps2 all the time. No problems what so ever.
p360’s are pretty much done once you have everything soldered. If all the connections are nice and tight, youll probably never open it up to fix it again. I suggest after you solder your wires to the PSX pad, tape them up with tape. Tape them to board itself. This gives the solder connections a little extra strength. It also gives you the option for a quick fix because if the soldered area comes off you can just use the tape to make the connection till you can fix it.
as for 8 ways I have mine setup with clamps instead of solder joints for my buttons and the stick. This gives me big problems because over time those pieces losen themselves off the connection. Eventually all 8ways go bad and you wont really know when it started doing it. Youll just play one day and your stick will act up. Trust me you dont want that.
the only p360’s I ever heard that went bad were the mas sticks. I only heard this from a few people and I know a guy whose gone through 3 of them. Perhaps its that extra wattage thats causing them to die. Other than random rumors and the DC glitch it has they’re still damn good sticks.