We already have transformed accelerometer and gyroscope into position. Our remaining challenge is to calibrate the Y axis correctly for a golf swing (this is the axis that measures perpendicular distance to the golf target. The Y axis 0 point is calculated based on the first 50- 100 miliseconds of activity. If this first movement is in the wrong plane the whole curve will be calculated incorrectly and the first movement will always be counted as zero. Instead we want the correct swing to be zero and any movement outside this correct swing to be either positive on the Y axis or negative. We know the movement of the correct swing plane in the first 100 miliseconds for a golfer, we can measure deltas or delta ratios. I suspect we need to make a fusion metric between accerometer data and gyroscope data and compare the deltas to the right backswing (in first 100 mileseconds). Looking for some scientific insight into this challenge we face please.