I have read threads on how to recalibrate other models and they all say they have 4 sets of numbers Max X-axis Min X-axis Max Y-axis Min Y-axis. Problem I am having is mine has 7 sets of numbers in the touch screen calibration data! Looks like this 8239 -16 -1210560 -3 4885 -1394004 65536. I kind of understand the process to recalibrate with the 4 sets but when I saw this I just didn't know where to go from there! Can anyone help me recalibrate this model of Tom Tom? Thanks!