use // Config BallDiameter = 65; BallClearance = 2; BallSealWidth = 2; PlateLip = 2; PlateDiameter = BallDiameter + 2*(BallClearance + BallSealWidth + PlateLip); PlateThick = BallSealWidth/2 + 1; //plate_full(); PlateSep = 0; pd = PlateDiameter+PlateSep; pt = PlateThick; echo("PD=", pd); ball(bottom=false);