The box moves

So like I said in my last post I went and bought a tank bot chassis last weekend. It showed up in my mailbox yesterday and I dropped everything that I was planning to do for the evening in order to slave tirelessly over said bot. Needless to say I had it up and trying to avoid walls in a matter of hours. The only problem being that it tried to avoid walls but still ran into them frequently. I'll have a video up sometime in the next few days after I get the thing to stop scraping the walls....