diff --git a/README.md b/README.md
index 3dad337..6f3be57 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,12 @@ Minimalistic implementation of Active Object pattern + FSM for embedded systems.
 
 [Request: retry/timeout, transition table demo](./examples/request-fsm/README.md)
 
+## Advantages
+
+Preprocessor templates allow strict typings and debugger suggestions, all types and enums have human-readable names, e.g. from [Request demo](./examples/request-fsm/README.md):
+
+![types](./docs/active-object-typings.png)
+
 TODO: make naming conventions e.g.:
 
 - types
diff --git a/examples/request-fsm/main.c b/examples/request-fsm/main.c
index 1574db1..c6d2d25 100644
--- a/examples/request-fsm/main.c
+++ b/examples/request-fsm/main.c
@@ -6,7 +6,7 @@
 #include "../../src/fsm/fsm.h"
 
 #define REQUEST_AO                      REQUEST_AO
-#define REQUEST_QUEUE_MAX_CAPACITY      (8)
+#define REQUEST_QUEUE_MAX_CAPACITY      (4)
 #define NO_RETRIES_LEFT                 (0)
 #define MAX_RETRIES                     (1)
 
@@ -15,6 +15,7 @@ typedef enum {
 } ACTIVE_OBJECT_ID;
 
 typedef enum {
+    NO_SIG,
     MAKE_REQUEST_SIG,
     REQUEST_SUCCESS_SIG,
     REQUEST_ERROR_SIG,
diff --git a/main b/main
index fe3a9e9..ba2c3e4 100755
Binary files a/main and b/main differ