diff --git a/src/common/grttProbe.cpp b/src/common/grttProbe.cpp
new file mode 100644
index 0000000..3f6554c
--- /dev/null
+++ b/src/common/grttProbe.cpp
@@ -0,0 +1,30 @@
+#include "grttProbe.h"
+
+// This code is _not_ part of the NORM protocol library. This
+// is an independent class that can be used as an alternative
+// to conduct the sort of GRTT probing that is conducted as part 
+// of NORM protocol operation.  This can be used in conjunction
+// with NORM by disabling NORM's built-in GRTT probing and using  
+// the information collected from this independent probing  to 
+// dynamically and explicitly set the NORM sender GRTT estimate.
+
+
+using namespace GrttProbe
+{
+    // return length in 32-bit words (i.e. 1 word == 4 bytes)
+    unsigned int GetIdWords(IdType idType)
+    {
+        switch (idType)
+        {
+            case ID_INT32:
+            case ID_IPV4:
+                return 1;
+            case ID_IPV6:
+                return 4;
+            case ID_ETH:
+                return 2;  // includes padding
+            default:
+                return 0;
+        }
+    }  // end GrttProbe::Message::GetIdWords()
+};  // end namespace GrttProbe
diff --git a/src/common/normNode.cpp b/src/common/normNode.cpp
index 719cbb6..e830543 100644
--- a/src/common/normNode.cpp
+++ b/src/common/normNode.cpp
@@ -813,7 +813,7 @@ void NormSenderNode::HandleCommand(const struct timeval& currentTime,
             }
             if (!synchronized)
             {
-                if (doAck)
+                if ((doAck) || (SYNC_ALL == sync_policy))
                 {
                     // Force sync since we're expected to ACK 
                     // and request repair for object indicated
@@ -2012,7 +2012,7 @@ void NormSenderNode::Sync(NormObjectId objectId)
                 max_pending_object = objectId;
                 break;
         }
-        SetPending(objectId);  // inclusively sets pending mask for next_id..objectId
+        SetPending(objectId);  // inclusively sets pending mask for next_id..objectId 
     }
 }  // end NormSenderNode::Sync()
 
diff --git a/src/common/normSession.cpp b/src/common/normSession.cpp
index 7524786..0185187 100644
--- a/src/common/normSession.cpp
+++ b/src/common/normSession.cpp
@@ -2397,10 +2397,10 @@ void NormSession::RxSocketRecvHandler(ProtoSocket &theSocket,
                     HandleReceiveMessage(msg, wasUnicast, ecnStatus);
                     msgLength = NormMsg::MAX_SIZE;
                 }
-                else
+                else  
                 {
                     PLOG(PL_ERROR, "NormSession::RxSocketRecvHandler() warning: received bad message\n");
-                }
+                }  // end if/else msg.InitFromBuffer()
                 // If our system gets very busy reading sockets, we should occasionally
                 // execute any timeouts to keep protocol operation smooth (i.e., sending feedback)
                 // TBD - perhaps this should be time based
diff --git a/src/pynorm/core.py b/src/pynorm/core.py
index 9c39b95..0cdee7e 100644
--- a/src/pynorm/core.py
+++ b/src/pynorm/core.py
@@ -503,7 +503,7 @@ def get_libnorm():
     # Experimental functions
     libnorm.NormCountCompletedObjects.restype = ctypes.c_uint32
     libnorm.NormCountCompletedObjects.argtypes = [ctypes.c_void_p]
-
+            
     return libnorm
 
 # Global libnorm reference that everyone should use