I’ve just aquired a Sorby Proedge Sharpening system,I’ve watched their tutorials on YouTube ,on how to sharpen a oval skew chisel,The person on the video ,seems not to long at the system,before he gets it sharpened,I’m using a 60 Ceramic belt to get the 15 degree angle,then switch to a 120 Ceramic belt ,as per the video,The length of time I’m spending to try a sharp edge is very long ,and the skew is very warm to the touch,and I just can’t get the middle of the skew edged out.Can anyone give me some advise ,