When I removed the bottom of the base, I was slightly amused to find an external powersupply mounted internally, and also glad about the extra space free in the housing...
Under the plastic cover to the right, is the fully self contained 4 port USB hub, has a 3amp 5volt power supply on the board... this is connected to the back of the actual LCD screen, 12volt, ground, and a signal to switch the 5volt supply on only when the monitor is on... excellent!
after removing the USB hub... eh look! the GBS fits
going to add an "Amiga" video port on the back of the stand in place of the USB socket, and run the VGA output from the GBS, up through the stand and into the back of the monitor... don't you just love when a plan comes together! two of the mounting holes even lined up!