diff --git a/src/lib/several-builder.hpp b/src/lib/several-builder.hpp
index dc96d2c86..8634322f9 100644
--- a/src/lib/several-builder.hpp
+++ b/src/lib/several-builder.hpp
@@ -44,17 +44,19 @@
 
 
 #include "lib/several.hpp"
-#include "include/logging.h"
+#include "lib/iter-explorer.hpp"
+#include "lib/util.hpp"
 
 #include <utility>
 #include <vector>
 
-using std::vector;
-using std::move;
 
 
 
 namespace lib {
+  using std::vector;
+  using std::forward;
+  using std::move;
   
   namespace {// Allocation managment policies
     
@@ -73,20 +75,77 @@ namespace lib {
     : Several<I>
     , POL
     {
-
+      using Col = Several<I>;
+      
+      size_t storageSiz_{0};
+      
     public:
+      SeveralBuilder() = default;
+      
+      /** start Several build using a custom allocator */
+      template<typename...ARGS,                  typename = meta::enable_if<std::is_constructible<POL,ARGS...>>>
+      SeveralBuilder (ARGS&& ...alloInit)
+        : Several<I>{}
+        , POL{forward<ARGS> (alloInit)...}
+        { }
+      
+      
+      SeveralBuilder&&
+      reserve (size_t cntElm)
+        {
+          adjustStorage (cntElm, sizeof(I));
+          return move(*this);
+        }
+      
+      template<class IT>
+      SeveralBuilder&&
+      appendAll (IT&& data)
+        {
+          explore(data).foreach ([this](auto it){ emplaceElm(it); });
+          return move(*this);
+        }
+      
       Several<I>
       build()
         {
           return move (*this);
         }
+      
+    private:
+      void
+      adjustStorage (size_t cnt, size_t spread)
+        {
+          UNIMPLEMENTED ("allocation");
+        }
+      
+      template<class IT>
+      void
+      emplaceElm (IT& dataSrc)
+        {
+          using Val = typename IT::value_type;
+          size_t elmSiz = sizeof(Val);
+          adjustStorage (Col::size_+1, requiredSpread(elmSiz));
+          UNIMPLEMENTED ("emplace data");
+        }
+      
+      size_t
+      requiredSpread (size_t elmSiz)
+        {
+          size_t currSpread = Col::empty()? 0 : Col::data_->spread;
+          return util::max (currSpread, elmSiz);
+        }
     };
   
+  
+  
+  
   template<typename X>
   SeveralBuilder<X>
   makeSeveral (std::initializer_list<X> ili)
   {
-    UNIMPLEMENTED ("start building a Several-Container");
+    return SeveralBuilder<X>{}
+            .reserve (ili.size())
+            .appendAll (ili);
   }
   
   
diff --git a/src/lib/several.hpp b/src/lib/several.hpp
index 364a032e9..4fe505e50 100644
--- a/src/lib/several.hpp
+++ b/src/lib/several.hpp
@@ -45,7 +45,8 @@ namespace lib {
   
   namespace {// Storage implementation details
     
-    struct Bucket
+    template<class I>
+    struct ArrayBucket
       {
         union Manager
           {
@@ -58,17 +59,13 @@ namespace lib {
         Manager manager;
         size_t spread;
         
-        template<class I>
-        auto access();
-      };
-    
-    template<class I, size_t bytes>
-    struct ArrayBucket
-      : Bucket
-      {
+        /** mark start of the storage area */
         alignas(I)
-          std::byte storage[bytes];
+          std::byte storage[sizeof(I)];
         
+        /** perform unchecked access into the storage area
+         * @note typically reaching behind the nominal end of this object
+         */
         I&
         subscript (size_t idx)
           {
@@ -79,16 +76,6 @@ namespace lib {
           }
       };
     
-    
-    /** @internal perform an unsafe down-cast to access the storage area */
-    template<class I>
-    auto
-    Bucket::access()
-    {
-      using Storage = ArrayBucket<I, sizeof(I)>;
-      return static_cast<Storage&> (*this);
-    }
-    
   }//(End)implementation details
   
   
@@ -105,8 +92,10 @@ namespace lib {
     : util::MoveAssign
     {
     protected:
-      size_t  size_{0};
-      Bucket* data_{nullptr};
+      using Bucket = ArrayBucket<I>*;
+      
+      size_t size_{0};
+      Bucket data_{nullptr};
       
     public:
       
@@ -126,7 +115,7 @@ namespace lib {
       operator[] (size_t idx)
         {
           REQUIRE (data_);
-          return data_->access<I>().subscript (idx);
+          return data_->subscript (idx);
         }
       
       I& front() { return operator[] (size_-1); }
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 5426aa3f5..22589bb90 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -81843,19 +81843,13 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716907249314" ID="ID_1711986050" MODIFIED="1716907418033" TEXT="Bucket">
-<node CREATED="1716907252393" ID="ID_198747165" MODIFIED="1716907259884" TEXT="der Descriptor"/>
-<node CREATED="1716907260424" ID="ID_1362772717" MODIFIED="1716907268555" TEXT="liegt am Anfang der Element-Storage"/>
-<node CREATED="1716912140198" ID="ID_9984568" MODIFIED="1716912197368" TEXT="erm&#xf6;glicht beliebigen Down-cast auf gegebene Storage-Gr&#xf6;&#xdf;e">
-<linktarget COLOR="#a9b4c1" DESTINATION="ID_9984568" ENDARROW="Default" ENDINCLINATION="97;4;" ID="Arrow_ID_396222637" SOURCE="ID_581123494" STARTARROW="None" STARTINCLINATION="0;-15;"/>
-</node>
-</node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716906944780" ID="ID_1643896091" MODIFIED="1716907418033" TEXT="ArrayBucket&lt;I,bytes&gt;">
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716906944780" ID="ID_1643896091" MODIFIED="1716912449577" TEXT="ArrayBucket&lt;I&gt;">
 <node CREATED="1716907277198" ID="ID_104268426" MODIFIED="1716907281769" TEXT="Subklasse von Bucket"/>
-<node CREATED="1716907312241" ID="ID_835337350" MODIFIED="1716907333394" TEXT="umspannt das Storage-Array"/>
+<node CREATED="1716907260424" ID="ID_214476532" MODIFIED="1716912475418" TEXT="liegt am Anfang der Element-Storage"/>
+<node CREATED="1716907312241" ID="ID_835337350" MODIFIED="1716912483271" TEXT="umspannt den Anfang vom Storage-Array"/>
 <node COLOR="#338800" CREATED="1716907356091" ID="ID_1876919425" MODIFIED="1716912200686" TEXT="enth&#xe4;lt den subscript-Code">
 <icon BUILTIN="button_ok"/>
-<node BACKGROUND_COLOR="#f8f1cb" COLOR="#a50125" CREATED="1716912163674" ID="ID_581123494" MODIFIED="1716912308218" TEXT="mu&#xdf; hier einen offenen Downcast machen">
+<node BACKGROUND_COLOR="#f8f1cb" COLOR="#a50125" CREATED="1716912163674" ID="ID_581123494" MODIFIED="1716912528793" TEXT="mu&#xdf; hier einen offenen Zugriff hinter das Objektende machen">
 <richcontent TYPE="NOTE"><html>
   <head>
     
@@ -81867,15 +81861,30 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
   </body>
 </html>
 </richcontent>
-<arrowlink DESTINATION="ID_9984568" ENDARROW="Default" ENDINCLINATION="97;4;" ID="Arrow_ID_396222637" STARTARROW="None" STARTINCLINATION="0;-15;"/>
 <icon BUILTIN="messagebox_warning"/>
 </node>
 </node>
+<node CREATED="1716907252393" ID="ID_1635839120" MODIFIED="1716907259884" TEXT="der Descriptor"/>
 </node>
 </node>
 <node CREATED="1716909012702" ID="ID_1876994172" MODIFIED="1716909016713" TEXT="const-correctness">
 <node CREATED="1716909019405" ID="ID_1406909807" MODIFIED="1716909042294" TEXT="ein const Several&lt;X&gt; ist ein Several&lt;const X&gt;"/>
 </node>
+<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1716914864769" ID="ID_966642586" MODIFIED="1716914906125" TEXT="Builder-Operationen">
+<icon BUILTIN="pencil"/>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716914869721" ID="ID_756769385" MODIFIED="1716914902541" TEXT="basis-Allokation">
+<icon BUILTIN="flag-yellow"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716914877848" ID="ID_1535626389" MODIFIED="1716914902541" TEXT="Gr&#xf6;&#xdf;en&#xe4;nderung Allokation">
+<icon BUILTIN="flag-yellow"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716914886169" ID="ID_505410227" MODIFIED="1716914902542" TEXT="&#xc4;nderung Spread">
+<icon BUILTIN="flag-yellow"/>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1716914892972" ID="ID_1080699305" MODIFIED="1716914902543" TEXT="Platzieren neuer Daten">
+<icon BUILTIN="flag-yellow"/>
+</node>
+</node>
 </node>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1715625082614" ID="ID_1575150785" MODIFIED="1715625089779" TEXT="SeveralBuilder_test">