diff --git a/src/gui/timeline/timeline-controller.cpp b/src/gui/timeline/timeline-controller.cpp
index 5403f6b6c..8a55e588e 100644
--- a/src/gui/timeline/timeline-controller.cpp
+++ b/src/gui/timeline/timeline-controller.cpp
@@ -138,6 +138,7 @@ namespace timeline {
   TimelineController::buildMutator (TreeMutator::Handle buffer)
   {
     using PMarker = unique_ptr<MarkerWidget>;
+    auto rootForkID = ID{*fork_};
     
     buffer.create (
       TreeMutator::build()
@@ -160,13 +161,13 @@ namespace timeline {
                     target->buildMutator (buff);               //  - delegate to child to build nested TreeMutator
                     return true;
                   }))
-        .mutateAttrib(ATTR_fork, [&](TreeMutator::Handle buff)
-            {                                                  // »Attribute Mutator« : how to enter an object field as nested scope
+        .mutateAttrib(rootForkID, [&](TreeMutator::Handle buff)
+            {                                                  // »Attribute Mutator« : how to enter the track-fork-object field as nested scope
               REQUIRE (fork_);
               fork_->buildMutator(buff);
             })
         .change(ATTR_name, [&](string val)
-            {                                                  // »Attribute Setter« : how to assign a new value to some object field
+            {                                                  // »Attribute Setter« : how to assign a new value to the name field (object member)
               name_ = val;
             }));
   }
diff --git a/src/lib/diff/tree-mutator-attribute-binding.hpp b/src/lib/diff/tree-mutator-attribute-binding.hpp
index 69221a1d2..398aa5963 100644
--- a/src/lib/diff/tree-mutator-attribute-binding.hpp
+++ b/src/lib/diff/tree-mutator-attribute-binding.hpp
@@ -359,6 +359,15 @@ namespace diff{
       return chainedBuilder<MutationOperation<PAR,CLO>> (key, mutatorBuilderClosure);
     }
     
+    /** Entry point for DSL builder; variation to handle an attribute-object with given ID */
+    template<class PAR>
+    template<typename CLO>
+    inline auto
+    Builder<PAR>::mutateAttrib (idi::BareEntryID const& rawID, CLO mutatorBuilderClosure)
+    {
+      return chainedBuilder<MutationOperation<PAR,CLO>> (rawID, mutatorBuilderClosure);
+    }
+    
     
     
   }//(END)Mutator-Builder decorator components...
diff --git a/src/lib/diff/tree-mutator.hpp b/src/lib/diff/tree-mutator.hpp
index 4e11d98c2..07a12fc57 100644
--- a/src/lib/diff/tree-mutator.hpp
+++ b/src/lib/diff/tree-mutator.hpp
@@ -373,7 +373,12 @@ namespace diff{
         template<typename CLO>
         auto mutateAttrib (Symbol attributeID, CLO mutatorBuilderClosure);
         
-        ///////////////////////////////////////TODO define variant taking a GenNode::ID ??
+        /**
+         * @param rawID the explicitly given ID of an attribute object,
+         *              used literally to match the attribute in question
+         */
+        template<typename CLO>
+        auto mutateAttrib (idi::BareEntryID const& rawID, CLO mutatorBuilderClosure);
         
         
         /** set up a binding to a structure of "child objects",
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index d2f2ca438..3f7be1a3c 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -21049,7 +21049,7 @@
 <node CREATED="1541545696185" ID="ID_1907010009" MODIFIED="1541545798109" TEXT="Grund: UI-Bus - Routing">
 <icon BUILTIN="info"/>
 </node>
-<node CREATED="1541545933006" ID="ID_1850412206" MODIFIED="1541547731516" TEXT="t&#xfc;ckisches Problem">
+<node COLOR="#435e98" CREATED="1541545933006" ID="ID_1850412206" MODIFIED="1541800215407" TEXT="t&#xfc;ckisches Problem">
 <linktarget COLOR="#c9876a" DESTINATION="ID_1850412206" ENDARROW="Default" ENDINCLINATION="49;-155;" ID="Arrow_ID_1571993328" SOURCE="ID_787025622" STARTARROW="None" STARTINCLINATION="-11;173;"/>
 <linktarget COLOR="#c9876a" DESTINATION="ID_1850412206" ENDARROW="Default" ENDINCLINATION="369;179;" ID="Arrow_ID_1229280605" SOURCE="ID_659707505" STARTARROW="None" STARTINCLINATION="586;-203;"/>
 <icon BUILTIN="messagebox_warning"/>
@@ -21212,7 +21212,7 @@
 </html>
 </richcontent>
 <icon BUILTIN="yes"/>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1541790717726" ID="ID_1884395735" MODIFIED="1541790738652" TEXT="explizites Attribut-Binding">
+<node COLOR="#338800" CREATED="1541790717726" ID="ID_1884395735" MODIFIED="1541800179010" TEXT="explizites Attribut-Binding">
 <richcontent TYPE="NOTE"><html>
   <head>
     
@@ -21224,7 +21224,7 @@
   </body>
 </html>
 </richcontent>
-<icon BUILTIN="flag-yellow"/>
+<icon BUILTIN="button_ok"/>
 </node>
 <node COLOR="#338800" CREATED="1541790780342" ID="ID_683694576" MODIFIED="1541798900109" TEXT="DSL-Syntax">
 <icon BUILTIN="button_ok"/>