Is it just the machines that I have in my area or does anyone else have this problem. I have one machine that is on its third level sensor. I started up 2 machines just before spring and 2 out of 3 on each one eventually had to be replaced. If they are having this kind of problem everywhere then why dont they set up some way to calibrate them instead of sealing them up. Or even better have a offset adjustment available on the board. This is ridiculous and a real pain in the rear. I have 1 at another sight that will require cutting a hole under the pole assy to get it out if it ever goes south. Some input please. Let me know that I am not alone.