Wish I could answer that but I don't even have a PS2. I don't think my mod chip for the ps one counts.
When I get my ps2 and mod chip I'll choose the weld on version. People seem to have this mortal fear of opening up expensive electronic equipment he he well I soldered the mod chip for my ps1 back in the days when it was considered "expensive" and everything went well. btw if you choose to solder you might want to get the fine tip soldering iron because those wires are ridiculously skinny and also don't forget to ground yourself to avoid the unlikely but possible incident of damaging your console with a zap of static electricity.