Recently purchased a Cube using the Purion unit. It had the "magnet" mod but has been returned to standard. I fitted a second computer to compare speeds, etc. And also get an accurate reading of distance because the Purion is not increasing the odometer as it should. Tested today the Purion read 2 miles whilst the second speedo read 9.5 miles, which is correct. The speeds are comparable but the odo's are far apart. Googled to no avail ,TIA.