Tried maxa/b it errored out, went hmm, decided to ask what other people are using instead of playing the guessing game.
Sounds like a plan. I personally think people use external websites to help them with A/B testing, such a unbounce. I launched a thread on this a while back. Hope this helps, Introduction to A/B Testing. I would love to know how you get on with this and your struggles along the way.