I basically took a keyboard stand and placed a 2' by 4' piece of 3/4" plywood on it. Then I started strapping down other items. I put my Robotic Arm on a roll around stand to the left of the setup. I spent most of the time updating and then upgrading each of the three RPis. I also added a tightvnc server to each of them and made sure the keyboard was US and the bootup goes right directly into the GUI. I should probably change this to coming up to the command line and then as I need it, bring up the GUI with "startx". I can do this by executing "sudo raspi-config" from the command line and selecting the GUI to not boot up. I made sure that each of the RPis have an SSH server running. I did discover two things over the weekend:
(1) strangely enough, the HDMI-to-VGA cable (the cheapest one that I could get) worked just fine with my VGA monitor.
(2) I discovered that a cable only 4-port USB hub (unpowered) was able to be used to pass power to two RPis at the same time, thereby freeing up one port on the power supply.
I also checked the serial cable, it is based upon an sl2303 chipset. It seemed to recognize the cable, although I have not checked out the workings of the servos via the SSC-32 yet.
