Update README.md

README.md

@@ -37,7 +37,7 @@ The head is designed to press the wire down with as little friction as possible,
 <img src='img/plothead-edm-2.jpg' height=300px>
 <img src='img/plothead-edm.jpg' height=300px>
 
-Plotting is done flat, but the substrate can be folded into three dimensional configurations.
+Plotting is done flat, but the substrate can be folded into three dimensional configurations.  More on this soon.
 
 Also, other wires can be plotted similarly.  More on this soon.