I need new O2 sensors and plan on getting a Tweecer here in a few days. I need to get wideband 02 sensors anyway, right? I have a Bassani x-pipe with cats. So, is there a certain type/brand to get? I already have a laptop, so is there anything else I need with the Tweecer other than a whole lot of time? Does anyone know the cheapest place for a Tweecer and wideband? Thanks...