First, I goofed a dimension on the pictures. It's fixed now, but the bolt hole width was off. What can I say, I'm better with calipers than a tape measure.
PC fired up just once, then shut it down. Don't want to mess with it until all the wires are ran. Soon....
Consider using a roll around toolbox. Or you could get a smaller top chest with one of those giant opening tops if you want it on a swing arm. Either way provides a lot of protection and storage. For that matter try looking in the storage section of one of the big home improvement stores. They can be pricey, but once you know what you want you can go scrounging / bargain hunting.