A piano hinge was welded to the mounting arm and wedge was made for the bottom. With the cable tray and wedge installed, the mounting arm is ROCK solid. The control panel has 1/4 20 screws to connect to the mounting arm. This way the control panel can be removed as one part. The same for the cable tray and arm, one assembly that is bolted to the CNC.
Now the control panel is mounted and swings nicely, just need to finish the swivel cable tray from the control to the main tray.
JH