hole_dia = 4 + 0.5;
hole_slot = 5;
-slop = 2; // total, not each side
+slop = 4; // total, not each side
torch_min_xcoord_fig_cm = -2.7; // coordinates of bottom left of curve
torch_min_ycoord_fig_cm = -5.9; // & big part in fig file. mid top is origin