Stranded, definitely. Solid core is ass to work with. 22 gauge can work, but feels a bit thick and unwieldy, and if you’re trying to to make it as solerless as possible by shoving wires into connectors, it’d be too thick. I’d say 24 gauge at the thickest, 26 or 28 gauge if you can swing it.
Either you should add the cost of a USB A-to-B cable to your running total, or I’d love to hear how you plan to connect the existing USB cable to the PS360 without soldering. If you try to tell me to twist and wrap ends with the four wire connector harness included with the PS360, I will laugh at you.
There are a few other tidbits that, at least in my opinion, make the ChimpSMD a better choice for adding PS3 support to a 360 TE/SE, but I’ll let those slide for now.
Don’t get me wrong, the PS360 is an awesome little board, and the best way to get PS3+360 into a CUSTOM stick, better than any of the stuff I currently make. But for modding production 360 sticks, ChimpSMD is a better fit.