I managed to hook up the power and usb data to the actual rp2354a chip, including both the 3.3 and 1.1v connections. It’s a bit messy, but it worked. I’m currently trying to figure out how to attach my extra flash memory, since that chip isn’t exactly tiny, and it still needs to reach the correct pins on the core. I’ll also have to leave room for GPIO wiring. But I’m still hoping it will continue to go fairly well.