Added clairification to the the solution branch section

README.md

@@ -56,11 +56,13 @@ No.
 
 ## The solution branch
 
-Both the xxx and motorVMC repos have a **solution** branch that:
+Both the xxx and motorVMC repos have a **solution** branch with tags for each step that:
 
 * allows you to run all the commands in this training **without editing a file in a text editor**.
 * enables jumping to a specific section
 
+Note: the motorVMC module is only modified in section 4, so the only tags it has for later sections are 5.1 and 6.1.
+
 ### Example: how to avoid manually editing files
 
 ### Example: how to jump to a specific section