Size Comparison
In some of the other pictures it may appear that a normal desktop case was just shoved inside another box. It was not nearly that easy, the only part that is original from a desktop case is the backplane holding the ports, power supply and cards. But even the backplane was modified.
Here are some picture comparisons showing the custom case sitting
next to an average size desktop computer. The desktop computer shown
for comparison is an average size tower, it is not an over sized tower. Sitting sideways it is the same height and width as the tower, but it is significantly smaller in the depth, almost half the size.

Bird's eye view
Case sitting upright
For further comparison, here is a standard letter size express envelope.

In fact, the Powerful Portable's effective weight is less than that of many laptops!

