Hi Heli Bee,
I have just imported your stl file into EdgeCam and produced the attached gcode. I have used the same feeds as you have and used a 20mm diameter end mill for the roughing cut and a 3mm ball nose for the finishing cut. Your original post said you used a 10mm radius cutter for roughing but did not say whether it was a ball nose or not. If you want me to change it, I can.
Hope this helps,
Mike
PS The attached file was a .rar not a .zip but the zone would not accept the .rar extension.