diff --git a/affine.scad b/affine.scad
index 725a743..b56bab4 100644
--- a/affine.scad
+++ b/affine.scad
@@ -459,7 +459,7 @@ function affine3d_rot_from_to(from, to) =
 
 // Function: affine3d_frame_map()
 // Usage:
-//   map = affine3d_frame_map(v1, v2, v3);
+//   map = affine3d_frame_map(v1, v2, v3, <reverse>);
 //   map = affine3d_frame_map(x=VECTOR1, y=VECTOR2, <reverse>);
 //   map = affine3d_frame_map(x=VECTOR1, z=VECTOR2, <reverse>);
 //   map = affine3d_frame_map(y=VECTOR1, z=VECTOR2, <reverse>);
diff --git a/paths.scad b/paths.scad
index 40322c6..9e7afcc 100644
--- a/paths.scad
+++ b/paths.scad
@@ -1172,7 +1172,7 @@ module path_spread(path, n, spacing, sp=undef, rotate_children=true, closed=fals
             sort([for(entry=ptlist) posmod(entry-listcenter,length)]) :
             [for(entry=ptlist) entry + length/2-listcenter ]
     );
-    distOK = min(distances)>=0 && max(distances)<=length;
+    distOK = is_def(n) || (min(distances)>=0 && max(distances)<=length);
     assert(distOK,"Cannot fit all of the copies");
     cutlist = path_cut(path, distances, closed, direction=true);
     planar = len(path[0])==2;
@@ -1186,7 +1186,7 @@ module path_spread(path, n, spacing, sp=undef, rotate_children=true, closed=fals
                 if(planar) {
                     rot(from=[0,1],to=cutlist[i][3]) children();
                 } else {
-                    multmatrix(affine2d_to_3d(transpose([cutlist[i][2],cross(cutlist[i][3],cutlist[i][2]), cutlist[i][3]])))
+                    multmatrix(affine3d_frame_map(x=cutlist[i][2], z=cutlist[i][3]))
                         children();
                 }
             } else {