2 files changed, 3 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 998b0ac..c52cfe7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,16 @@
 -include Makefile.local
 
 OPENSCAD_APP?=/Applications/OpenSCAD.app
 OPENSCAD_BIN?=${OPENSCAD_APP}/Contents/MacOS/OpenSCAD
+OPENSCAD_FLAGS=-D draft=false
 
 default: fanduct-circular.stl fanduct-3jets.stl fanduct-dual.stl
 
 clean:
         rm -f *.stl
 
 fanduct-%.stl: fanduct-%.scad fanduct.scad
 
 
 %.stl: %.scad
         ${OPENSCAD_BIN} ${OPENSCAD_FLAGS} -o "$@" "$<"
diff --git a/fanduct.scad b/fanduct.scad
index 690a4c8..8d0414f 100644
--- a/fanduct.scad
+++ b/fanduct.scad
@@ -19,49 +19,50 @@ inlet_away = 15;	// how far away inlet is
 inlet_long_l = inlet_short_l+inlet_h;
 function hypothenuse(a,b) = sqrt(pow(a,2)+pow(b,2));
 
 silicone_shell = 2;
 heater_clearance = dual
        ? max(20,15.5) - 4.5 + silicone_shell
        : max(
                 hypothenuse(16/2     +silicone_shell, 20-4.5 +silicone_shell),// E3D v6
                 hypothenuse(11.5-4.5 +silicone_shell, 15.5   +silicone_shell)// E3D volcano
        );
 
         fanduct_elevation = 3;                                          // fanduct elevation above nozzle tip
         fanduct_blowtarget = -2;                                        // what to blow at
         fanduct_h = 6;                                                  // inner height of the duct
         fanduct_w = 7;                                                  // inner width of the duct
         fanduct_shell=1.2;                                              // shell thickness
         fanduct_ir = heater_clearance+5;                                // inner radius
 
         jet_angle = 60-2;       // angular width of the jet
 
 hotend_clearance = heater_clearance;
 
         snapper_d = 8; snapper_overlap=0.2;// snip snap
 
-smooth_f = 120;
+draft=true;
+smooth_f = draft? 30 : 120;
 
 to_midduct = fanduct_ir+fanduct_shell+fanduct_w/2;
 dual_spots = [ [+space_behind_nozzle, -(to_midduct+nozzles_apart/2)],
                [-         to_midduct, -(to_midduct+nozzles_apart/2)],
                [-         to_midduct, 0] ];
 
 module fanduct(type=type,ductshape=ductshape,dual=dual) {
          //     ***duct is all around!
  module duct(what) {
   module single() {
    if(what=="in") {
     sh = fanduct_w+2*fanduct_shell; sv = fanduct_h+2*fanduct_shell;
     smax = max(sh,sv);
     rotate_extrude($fn=smooth_f)
      if(ductshape=="round")
       translate([sh/2+fanduct_ir,sv/2])
       scale([sh/smax,sv/smax])
       circle(d=smax,$fn=4*smax);
      else if(ductshape=="square")
       translate([fanduct_ir,0])
       square([sh,sv]);
    }else if(what=="out") {
     sh = fanduct_w; sv = fanduct_h;
     smax = max(sh,sv);