diff --git a/stpa handbook.md b/stpa handbook.md
index 20cc7b696..1682ff104 100644
--- a/stpa handbook.md	
+++ b/stpa handbook.md	
@@ -54,4 +54,8 @@ Refining control structures:
 
 On [[control]] proper:
 
-![[Pasted image 20210719005502.png]]
\ No newline at end of file
+![[Pasted image 20210719005502.png]]
+
+tips to prevent common mistakes in a control structure: 
+
+![[Pasted image 20210719010243.png]]
\ No newline at end of file
diff --git a/system theoretic process analysis.md b/system theoretic process analysis.md
index 7ad55d7f6..de777da88 100644
--- a/system theoretic process analysis.md	
+++ b/system theoretic process analysis.md	
@@ -24,5 +24,4 @@
 		- control goes down, feedback goes up
 			- vertical axis represents a hierarchy ([[heterarchy]]? perhaps in voting systems)
 		- [[responsibilities]] can be assigned to each control structure entity; they are refinements of [[system level constraints]]
-		- [[feedback]] can be derived from [[responsibilities]] (which information does the process model need to contain?)
-		- tips to prevent common mistakes in a control struc![[Pasted image 20210719010243.png]]
\ No newline at end of file
+		- [[feedback]] can be derived from [[responsibilities]] (which information does the process model need to contain?)
\ No newline at end of file