Ran into a snag - my wonderful Windoze 7 laptop will not connect to my Arduino Uno, my Arduino Mega2560, or my TinkerKit! LCD module. Furthermore, my JBD MPGuino is still with the Karenmobile, back in Ohio. So, for the time being, no MPGuino for the truck.
However, I did finally join the ranks of smartphone users, and got a Motorola Droid Maxx. I also ordered a ScanTool 427201 OBDLink LX Bluetooth module, and will purchase the Torque Pro app once I get the module in hand.
I also corrected the aerocap itself. It was sticking out about 1/4 of an inch above the cab roof. It also had that annoying gap. The gap is now removed, and the aerocap is now flush with the cab roof.
(click on a picture to enlarge)