diff --git a/README.md b/README.md
index 21c80289..0ef6d3d8 100644
--- a/README.md
+++ b/README.md
@@ -184,8 +184,9 @@ seems a lot clearer to me than:
cylinder()
)
+
Again, I took this from someone's SCAD work and have lost track of the
-`original author. My apologies.
+original author. My apologies.
### Arcs
I've found this useful for fillets and rounds.
@@ -203,6 +204,12 @@ This is the shape you need to add to make fillets or remove to make rounds.
To offset a set of points in one direction or another ( inside or outside a closed
figure, for example) use `solid.utils.offset_points( point_arr, offset, inside=True)`
+Note that, for a non-convex figure, inside and outside may be non-intuitive. The
+simple solution is to manually check that your offset is going in the direction you
+intend, and change the boolean value of `inside` if you're not happy.
+
+See the code for futher explanation. Improvements on the inside/outside would be welcome.
+
###Extrude Along Path
`solid.utils.extrude_along_path( shape_pts, path_pts, scale_factors=None)`
@@ -245,7 +252,7 @@ solid.screw_thread
solid.screw_thread includes a method, thread() that makes internal and external
screw threads.
-See ``solid/examples/screw_thread_example.py` for more details.
+See `solid/examples/screw_thread_example.py` for more details.
Contact
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