diff --git a/doc/binary_c2.lyx b/doc/binary_c2.lyx
index 95962fe7ddfbec2044334eeaacf4dca3bdd0d7c8..29f3521d56e7e84f3af2cb4ddaca98354019020a 100644
--- a/doc/binary_c2.lyx
+++ b/doc/binary_c2.lyx
@@ -569,7 +569,7 @@ An introduction to the
 \begin_inset Newline newline
 \end_inset
 
-Version 2.1.4
+Version 2.1.5
 \begin_inset Newline newline
 \end_inset
 
@@ -1326,10 +1326,6 @@ export LD_LIBRARY_PATH=$HOME/lib
 export LIBRARY_PATH=$HOME/lib
 \end_layout
 
-\begin_layout Plain Layout
-
-\end_layout
-
 \end_inset
 
 and 
@@ -11804,7 +11800,7 @@ RLOF_interpolation_method=RLOF_INTERPOLATION_BSE(=1)
 
 \end_inset
 
-, a Newton-like interpolation in time is performed to find 
+, interpolation in time is performed to find 
 \begin_inset Formula $R=R_{L}$
 \end_inset
 
@@ -11840,7 +11836,7 @@ stardata
 
 \end_inset
 
- is loaded over the current 
+ is loaded over the top of the current 
 \begin_inset Flex CStruct
 status open
 
@@ -11855,7 +11851,15 @@ stardata
 \begin_inset Formula $R=R_{L}$
 \end_inset
 
-, always with a positive timestep.
+, to within a small threshold (e.g.
+\begin_inset space ~
+\end_inset
+
+
+\begin_inset Formula $10^{-6}$
+\end_inset
+
+), always with a positive timestep.
 \end_layout
 
 \begin_layout Standard