We recently purchased an RX400 with Moba , but every since we bought it we can't seem to get the computer to running correctly. We've tried zeroing out the sensors and nothing. What's odd is you can zero it out and it will be fine as far as 0 level is concerned but right when it goes to - it acts up. We have it set to 4.5 on both sides to get a 6 inch cut. Its off 1.5 on both sides. I was just wondering if anyone had some suggestions ....