I've just planted some game cover mix-small seed, of kale, millet mix. I took time to calibrate it with the turn handle and weigh seed. However, when I drilled I must of nearly drilled double! Well maybe 1.5 times, looked in hopper and most my seed gone. It should have been approx 10 kilo to hectare. My scale has come off but I still have it and noticed the increments are roughly 1mm like on a ruler scale. So I had the gap set at what would have been around 8?? Anything else I've done wrong?