I got mine all hooked up and was wondering if anyone used a differnt boost pressure sensor with the zt-2 unit? I just couldnt justify spending $100 when I got a mechanical boost gauge to look at. Has any1 used the stock pressure sensor with this? I know its only a 2 BAR sensor and the Zeitronix one is a 3.5 bar, but they both are a 3 wire 5v sensor. I know that the unit doesnt need the boost sensor but Id like to have some reference when I hook it up for data logging. Would it hurt anything to use the stock celica sensor? Or should I eventually move to a gm 3 BAR sensor, or not use one at all?