Sorry for the late reply. We have bailed out the basement and now the dehumidifier is working overtime.
What @RyanPowell said is true - 4x4’s are a PITA to work and it’s just cheaper / easier to use 2x4 studs. That said, here is a file showing an exploded view of what I built - use it - don’t use it - use it for inspiration - circular file it. Whatever, but I thought it might help!
CNC Table Exploded.pdf (368.7 KB)