diff --git a/reco/steer/CbmSourceTsArchive.cxx b/reco/steer/CbmSourceTsArchive.cxx
index 90fa59a0f9b516ba0d1dec7f69ad53216d4d9599..0e657fbd895ad7f55f48ef3cbd1811ab01c84a9d 100644
--- a/reco/steer/CbmSourceTsArchive.cxx
+++ b/reco/steer/CbmSourceTsArchive.cxx
@@ -7,8 +7,7 @@
 
 #include "CbmSourceTsArchive.h"
 
-#include <TimesliceMultiInputArchive.hpp>
-#include <TimesliceMultiSubscriber.hpp>
+#include <TimesliceAutoSource.hpp>
 
 #include <FairSource.h>
 #include <Logger.h>
@@ -46,56 +45,8 @@ void CbmSourceTsArchive::Close()
 // -----   Initialisation   ---------------------------------------------------
 Bool_t CbmSourceTsArchive::Init()
 {
+  fTsSource = new fles::TimesliceAutoSource(fFileNames);
 
-  switch (fCbmSourceType) {
-    // Use again when kFILE does not skipp the first TS by default anymore
-    // case Source_Type::kONLINE: {
-    case eCbmSourceType::kOnline: {
-      // Create a ";" separated string with all host/port combinations
-      // Build a semicolon-separated list of file names for TimesliceMultiInputArchive
-      string fileList;
-      for (const auto& fileName : fFileNames) {
-        fileList += fileName;
-        fileList += ";";
-      }
-      fileList.pop_back();  // Remove last semicolon after last file name
-
-      fTsSource = new fles::TimesliceMultiSubscriber(fileList, fHighWaterMark);
-
-      /// Initialize the Multisubscriber
-      /// (This restores the original behavior after modifications needed to make the MQ version
-      dynamic_cast<fles::TimesliceMultiSubscriber*>(fTsSource)->InitTimesliceSubscriber();
-
-      if (!fTsSource) {
-        LOG(fatal) << "Could not connect to the TS publisher.";
-        return kFALSE;
-      }
-      break;
-    }
-    // Se above
-    // case Source_Type::kFILE: {
-    case eCbmSourceType::kOffline: {
-      // Return error for empty file list and an offline run
-      if (fFileNames.empty()) return kFALSE;
-
-
-      // Build a semicolon-separated list of file names for TimesliceMultiInputArchive
-      string fileList;
-      for (const auto& fileName : fFileNames) {
-        fileList += fileName;
-        fileList += ";";
-      }
-      fileList.pop_back();  // Remove last semicolon after last file name
-
-      // Create the proper TS source
-      fTsSource = new fles::TimesliceMultiInputArchive(fileList);
-      if (!fTsSource) {
-        LOG(error) << "SourceTsArchive: Failed to create TSMultiInputArchive!";
-        return kFALSE;
-      }
-      break;
-    }
-  }
   // Initialise unpacker
   fUnpack.Init();
   LOG(info) << "Source: Init done";
diff --git a/reco/steer/CbmSourceTsArchive.h b/reco/steer/CbmSourceTsArchive.h
index c67cba991cc9c1633d150a37252bd40cbae747e3..aa8f8534771474f862f2cb42c77cdb6e87a81fd6 100644
--- a/reco/steer/CbmSourceTsArchive.h
+++ b/reco/steer/CbmSourceTsArchive.h
@@ -24,7 +24,7 @@
  ** @since 2 June 2021
  **
  ** This class allows to read time-slice data from file(s) and hands them to
- ** the unpacking stage. It interfaces fles::TimesliceMultiInputArchive to cbmroot.
+ ** the unpacking stage. It interfaces fles::TimesliceAutoSource to cbmroot.
  **/
 class CbmSourceTsArchive : public FairSource {
 
@@ -106,9 +106,6 @@ public:
   /** @brief Reset clear the output vectors as preparation for the next timeslice. Forwarded to CbmRecoUnpack **/
   virtual void Reset() { fUnpack.Reset(); }
 
-  /** @brief Set the high water mark (limit of buffered timeslice by the publisher) */
-  void SetHighWaterMark(std::uint32_t value) { fHighWaterMark = value; }
-
   /** @brief Set unpacker parameters (forced by base class) **/
   virtual void SetParUnpackers() {}
 
@@ -125,9 +122,6 @@ private:
   /** List of input file names **/
   std::vector<std::string> fFileNames = {};
 
-  /** @brief Amount of Timeslices buffered before the publisher starts dropping new ones, if the old are not digested yet.*/
-  std::uint32_t fHighWaterMark = 1;
-
   /** @brief type of source that is currently used @remark currently we use kONLINE as default, since, kFILE skipps the first TS probably due to obsolete reasons (to be checked PR072021) */
   Source_Type fSourceType = Source_Type::kONLINE;