diff --git a/C4.puml b/C4.puml
index 2fc0634..ce06b85 100644
--- a/C4.puml
+++ b/C4.puml
@@ -79,83 +79,83 @@ $alias1 $direction $alias2 : **$label**\n//<size:$TECHN_FONT_SIZE>[$techn]</size
 !endfunction
 
 !unquoted function Rel($from, $to, $label)
-Rel_($from, $to, $label, "-->")
+Rel_($from, $to, $label, "-->>")
 !endfunction
 !unquoted function Rel($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-->")
+Rel_($from, $to, $label, $techn, "-->>")
 !endfunction
 
 !unquoted function Rel_Back($from, $to, $label)
-Rel_($from, $to, $label, "<--")
+Rel_($from, $to, $label, "<<--")
 !endfunction
 !unquoted function Rel_Back($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "<--")
+Rel_($from, $to, $label, $techn, "<<--")
 !endfunction
 
 !unquoted function Rel_Neighbor($from, $to, $label)
-Rel_($from, $to, $label, "->")
+Rel_($from, $to, $label, "->>")
 !endfunction
 !unquoted function Rel_Neighbor($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "->")
+Rel_($from, $to, $label, $techn, "->>")
 !endfunction
 
 !unquoted function Rel_Back_Neighbor($from, $to, $label)
-Rel_($from, $to, $label, "<-")
+Rel_($from, $to, $label, "<<-")
 !endfunction
 !unquoted function Rel_Back_Neighbor($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "<-")
+Rel_($from, $to, $label, $techn, "<<-")
 !endfunction
 
 !unquoted function Rel_D($from, $to, $label)
-Rel_($from, $to, $label, "-DOWN->")
+Rel_($from, $to, $label, "-DOWN->>")
 !endfunction
 !unquoted function Rel_D($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-DOWN->")
+Rel_($from, $to, $label, $techn, "-DOWN->>")
 !endfunction
 !unquoted function Rel_Down($from, $to, $label)
-Rel_($from, $to, $label, "-DOWN->")
+Rel_($from, $to, $label, "-DOWN->>")
 !endfunction
 !unquoted function Rel_Down($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-DOWN->")
+Rel_($from, $to, $label, $techn, "-DOWN->>")
 !endfunction
 
 !unquoted function Rel_U($from, $to, $label)
-Rel_($from, $to, $label, "-UP->")
+Rel_($from, $to, $label, "-UP->>")
 !endfunction
 !unquoted function Rel_U($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-UP->")
+Rel_($from, $to, $label, $techn, "-UP->>")
 !endfunction
 !unquoted function Rel_Up($from, $to, $label)
-Rel_($from, $to, $label, "-UP->")
+Rel_($from, $to, $label, "-UP->>")
 !endfunction
 !unquoted function Rel_Up($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-UP->")
+Rel_($from, $to, $label, $techn, "-UP->>")
 !endfunction
 
 !unquoted function Rel_L($from, $to, $label)
-Rel_($from, $to, $label, "-LEFT->")
+Rel_($from, $to, $label, "-LEFT->>")
 !endfunction
 !unquoted function Rel_L($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-LEFT->")
+Rel_($from, $to, $label, $techn, "-LEFT->>")
 !endfunction
 !unquoted function Rel_Left($from, $to, $label)
-Rel_($from, $to, $label, "-LEFT->")
+Rel_($from, $to, $label, "-LEFT->>")
 !endfunction
 !unquoted function Rel_Left($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-LEFT->")
+Rel_($from, $to, $label, $techn, "-LEFT->>")
 !endfunction
 
 !unquoted function Rel_R($from, $to, $label)
-Rel_($from, $to, $label, "-RIGHT->")
+Rel_($from, $to, $label, "-RIGHT->>")
 !endfunction
 !unquoted function Rel_R($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-RIGHT->")
+Rel_($from, $to, $label, $techn, "-RIGHT->>")
 !endfunction
 !unquoted function Rel_Right($from, $to, $label)
-Rel_($from, $to, $label, "-RIGHT->")
+Rel_($from, $to, $label, "-RIGHT->>")
 !endfunction
 !unquoted function Rel_Right($from, $to, $label, $techn)
-Rel_($from, $to, $label, $techn, "-RIGHT->")
+Rel_($from, $to, $label, $techn, "-RIGHT->>")
 !endfunction
 
 ' Layout Helpers