was once a BOE bot

I bought a parallax BOE-bot(the arduino robot shield) but had trouble with the 5v outputs when it went through the board. I modified it with some plates I bought at the home depot to make the platform above the BOE-bot platform.  the original base and the two continious rotation servos are the only thing that is left from the BOE-bot, the battery is a 6000mAh portable battery from Radioshack, it has usb out, so cut a charging cable and separated out power and ground. it plugs into the power rails of the breadboard and the other ed of the usb cable is used to provide power from the breadboard to the usb power port of a raspberry pi B rev 2 board. the raspberry pi and the arduous communicate USB and the arduino mega will serve as the IO board and the pi as the brains of the operation. Im very new to the programming and electronics thing, but I've been doing a fair amount of reading, and research any tips or tricks or criticism of my project or code would be greatly appreciated