diff --git a/public/sample_ext/sdk/smsdk_config.h b/public/sample_ext/sdk/smsdk_config.h
index af26a061..ad8762ec 100644
--- a/public/sample_ext/sdk/smsdk_config.h
+++ b/public/sample_ext/sdk/smsdk_config.h
@@ -45,4 +45,10 @@
  */
 //#define SMEXT_CONF_METAMOD		
 
+/** Enable interfaces you want to use here by uncommenting lines */
+//#define SMEXT_ENABLE_FORWARDSYS
+//#define SMEXT_ENABLE_HANDLESYS
+//#define SMEXT_ENABLE_PLAYERHELPERS
+//#define SMEXT_ENABLE_DBMANAGER
+
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_CONFIG_H_
diff --git a/public/sample_ext/sdk/smsdk_ext.cpp b/public/sample_ext/sdk/smsdk_ext.cpp
index d7d3ba02..2655063b 100644
--- a/public/sample_ext/sdk/smsdk_ext.cpp
+++ b/public/sample_ext/sdk/smsdk_ext.cpp
@@ -25,11 +25,26 @@
  * @brief Contains wrappers for making Extensions easier to write.
  */
 
-IShareSys *g_pShareSys = NULL;			/**< Share system */
 IExtension *myself = NULL;				/**< Ourself */
-IHandleSys *g_pHandleSys = NULL;		/**< Handle system */
+IShareSys *g_pShareSys = NULL;			/**< Share system */
+IShareSys *sharesys = NULL;				/**< Share system */
 ISourceMod *g_pSM = NULL;				/**< SourceMod helpers */
+ISourceMod *smutils = NULL;				/**< SourceMod helpers */
+
+#if defined SMEXT_ENABLE_FORWARDSYS
 IForwardManager *g_pForwards = NULL;	/**< Forward system */
+IForwardManager *forwards = NULL;		/**< Forward system */
+#endif
+#if defined SMEXT_ENABLE_HANDLESYS
+IHandleSys *g_pHandleSys = NULL;		/**< Handle system */
+IHandleSys *handlesys = NULL;			/**< Handle system */
+#endif
+#if defined SMEXT_ENABLE_PLAYERHELPERS
+IPlayerHelpers *playerhelpers = NULL;	/**< Player helpers */
+#endif //SMEXT_ENABLE_PLAYERHELPERS
+#if defined SMEXT_ENABLE_DBMANAGER
+IDBManager *dbi = NULL;					/**< DB Manager */
+#endif //SMEXT_ENABLE_DBMANAGER
 
 /** Exports the main interface */
 PLATFORM_EXTERN_C IExtensionInterface *GetSMExtAPI()
@@ -48,7 +63,7 @@ SDKExtension::SDKExtension()
 
 bool SDKExtension::OnExtensionLoad(IExtension *me, IShareSys *sys, char *error, size_t maxlength, bool late)
 {
-	g_pShareSys = sys;
+	g_pShareSys = sharesys = sys;
 	myself = me;
 
 #if defined SMEXT_CONF_METAMOD
@@ -63,10 +78,22 @@ bool SDKExtension::OnExtensionLoad(IExtension *me, IShareSys *sys, char *error,
 		return false;
 	}
 #endif
-
-	SM_GET_IFACE(HANDLESYSTEM, g_pHandleSys);
 	SM_GET_IFACE(SOURCEMOD, g_pSM);
+	smutils = g_pSM;
+#if defined SMEXT_ENABLE_HANDLESYS
+	SM_GET_IFACE(HANDLESYSTEM, g_pHandleSys);
+	handlesys = g_pHandleSys;
+#endif
+#if defined SMEXT_ENABLE_FORWARDSYS
 	SM_GET_IFACE(FORWARDMANAGER, g_pForwards);
+	forwards = g_pForwards;
+#endif
+#if defined SMEXT_ENABLE_PLAYERHELPERS
+	SM_GET_IFACE(PLAYERMANAGER, playerhelpers);
+#endif
+#if defined SMEXT_ENABLE_DBMANAGER
+	SM_GET_IFACE(DBI, dbi);
+#endif
 
 	if (SDK_OnLoad(error, maxlength, late))
 	{
diff --git a/public/sample_ext/sdk/smsdk_ext.h b/public/sample_ext/sdk/smsdk_ext.h
index 24647206..eaf041ac 100644
--- a/public/sample_ext/sdk/smsdk_ext.h
+++ b/public/sample_ext/sdk/smsdk_ext.h
@@ -30,7 +30,15 @@
 #include <sp_vm_api.h>
 #include <sm_platform.h>
 #include <ISourceMod.h>
+#if defined SMEXT_ENABLE_FORWARDSYS
 #include <IForwardSys.h>
+#endif //SMEXT_ENABLE_FORWARDSYS
+#if defined SMEXT_ENABLE_PLAYERHELPERS
+#include <IPlayerHelpers.h>
+#endif //SMEXT_ENABLE_PlAYERHELPERS
+#if defined SMEXT_ENABLE_DBMANAGER
+#include <IDBDriver.h>
+#endif //SMEXT_ENABLE_DBMANAGER
 
 #if defined SMEXT_CONF_METAMOD
 #include <ISmmPlugin.h>
@@ -171,12 +179,28 @@ private:
 };
 
 extern SDKExtension *g_pExtensionIface;
+extern IExtension *myself;
 
 extern IShareSys *g_pShareSys;
-extern IExtension *myself;
-extern IHandleSys *g_pHandleSys;
+extern IShareSys *sharesys;				/* Note: Newer name */
 extern ISourceMod *g_pSM;
+extern ISourceMod *smutils;				/* Note: Newer name */
+
+/* Optional interfaces are below */
+#if defined SMEXT_ENABLE_FORWARDSYS
 extern IForwardManager *g_pForwards;
+extern IForwardManager *forwards;		/* Note: Newer name */
+#endif //SMEXT_ENABLE_FORWARDSYS
+#if defined SMEXT_ENABLE_HANDLESYS
+extern IHandleSys *g_pHandleSys;
+extern IHandleSys *handlesys;			/* Note: Newer name */
+#endif //SMEXT_ENABLE_HANDLESYS
+#if defined SMEXT_ENABLE_PLAYERHELPERS
+extern IPlayerHelpers *playerhelpers;
+#endif //SMEXT_ENABLE_PLAYERHELPERS
+#if defined SMEXT_ENABLE_DBMANAGER
+extern IDBManager *dbi;
+#endif //SMEXT_ENABLE_DBMANAGER
 
 #if defined SMEXT_CONF_METAMOD
 PLUGIN_GLOBALVARS();
@@ -192,7 +216,7 @@ extern IServerGameDLL *gamedll;
 	{ \
 		if (error) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
 			return false; \
 		} \
 	}