Cheers, any other thoughts after watching it? I ordered 5 hall sensors today. 3.8 - 30v ( or is it amps )I found 2 of them stuck at 3v and not resetting to zero. There was no part number on the sensor I removed leaving me to guess from the shape , size and voltage which to take. Travelled 30 km to the shop only to find they only had 1 in stock, I needed 2. Put an order in and hopefully DHL will drop them off in the morning. Fingers crossed.