I bought a Tamaya base kit with a tracked wheel set and assembled it. Put leads on the engines and added heat shrink. I then sculpted an acrylic plate, added the breadboard and wired up the motors, a "horn" and light. Mounted the arduino with dual motor controller sheild. Mounted a servo and a battery holder shortly afterwards.

It's partially wired, since I removed most of the test wiring to be replaced with a more efficient harness with pinned ends so motor control lines, power lines, servo lines and other control points plug into the breadboard far easier.

With the addition of the batteries, it's also slightly off balance and moving forward tends to up-end it. The lower three wheels can luckily be moved back as far as I need them, up to the rear drive spoke. I could also just redo the acrylic plate and remount the battery in the center with the servo in the back or removed entirely.

Currently, the programming is still in it's most primitive stages. Right now it only performs a demo. Slow speed advance, fast speed advance, servo direction to max right, turn with tracks in reverse directions, medium speed, servo to max left and then back to center, turn using one track sliding, super slow speed just above a PWM stall... and finish with a calculated/timed 360 degree turn.