diff --git a/input_files/config_file.py b/input_files/config_file.py
index 7acd38e..6531151 100644
--- a/input_files/config_file.py
+++ b/input_files/config_file.py
@@ -14,85 +14,32 @@ import pygit2 as pygit
 author = pygit.Signature('Florez Ospina Juan Felipe', 'juan.florez-ospina@psi.ch')
 committer = pygit.Signature('Florez Ospina Juan Felipe', 'juan.florez-ospina@psi.ch')
 
-group_id = 'smog_chamber'
-
-#group_id = '5505'
 
 output_filename_tempate = lambda group_id, timestamp,user_initials : '_'.join(['unified_file',group_id,timestamp,user_initials])+'.h5'
 
+def created_at():
 
-now = datetime.now()
-# Populate now object with time zone infotmation obtained from the local system
-now_tz_aware = now.astimezone()
-tz = now_tz_aware.strftime('%z')
-#created_at = now_tz_aware.strftime('%Y-%m-%d_%H-%M-%S')+'_utcoffset_' + tz
-created_at = now_tz_aware.strftime('%Y-%m-%d')+'_UTC-OFST_' + tz
-# Make created at timestamp with tz information
-#created_at = now.isoformat()
-
-usecase = 1
-
-if usecase == 1:
-
-    group_id == 'smog_chamber'
-    user_initials = 'NG'
-    #from smog_chamber_file_reader import read_txt_files_as_dict 
-    #from g5505_file_reader import copy_file_in_group
-    #select_dir_keywords = ['htof','ams', 'ptr', 'gas','smps']    
-    inputfile_dir = '\\\\fs03\\Iron_Sulphate'
-    inputfile_dir = '//fs03/Iron_Sulphate'
-    #select_dir_keywords = ['gas','smps\\20220726','htof\\2022.07.26','ptr\\2022.07.26','ams\\2022.07.26']
-    select_dir_keywords = ['gas','smps/20220726']#,'htof/2022.07.26','ptr/2022.07.26','ams/2022.07.26']
-    select_file_keywords = ['20220726','2022.07.26']
-
-    outputfile_dir = 'output_files'
-
-    output_filename = output_filename_tempate(group_id,created_at,user_initials) #'test_smog_chamber_v14.h5'
-    #output_filename = 'unified_file_smog_chamber_2024-03-19_UTC-OFST_+0100_NG.h5'
+    now = datetime.now()
+    # Populate now object with time zone infotmation obtained from the local system
+    now_tz_aware = now.astimezone()
+    tz = now_tz_aware.strftime('%z')
+    #created_at = now_tz_aware.strftime('%Y-%m-%d_%H-%M-%S')+'_utcoffset_' + tz
+    created_at = now_tz_aware.strftime('%Y-%m-%d')+'_UTC-OFST_' + tz
+    # Make created at timestamp with tz information
+    #created_at = now.isoformat()
+    return created_at
 
 
-    ext_to_reader_dict = {'.txt': scf_reader.read_txt_files_as_dict,
+def select_file_readers(group_id):
+    if group_id == '5505':
+        ext_to_reader_dict = {'.ibw': g5505f_reader.read_xps_ibw_file_as_dict,
+                          '.txt': g5505f_reader.read_txt_files_as_dict,
+                          '.dat': g5505f_reader.read_txt_files_as_dict,
+                          '.h5': g5505f_reader.copy_file_in_group}
+    elif group_id == 'smog_chamber':
+        ext_to_reader_dict = {'.txt': scf_reader.read_txt_files_as_dict,
                         '.TXT': scf_reader.read_txt_files_as_dict,
                         '.h5': g5505f_reader.copy_file_in_group}
-    
-elif usecase == 2 :
 
-    group_id == '5505'
-    user_initials = 'TBR'
-    outputfile_dir = 'output_files'
-    #output_filename = 'test_sls_data_v8.h5'
-    inputfile_dir = '//fs101/5505/People/Juan/TypicalBeamTime'
-    select_file_keywords=[]
-    select_dir_keywords = ['NEXAFS', 'Notes', 'Photos', 'Pressure', 'RGA', 'SES']
-
-    output_filename = output_filename_tempate(group_id,created_at,user_initials)
-    #output_filename = 'unified_file_5505_2024-03-19_UTC-OFST_+0100_TBR.h5'
-
-    ext_to_reader_dict = {'.ibw': g5505f_reader.read_xps_ibw_file_as_dict,
-                          '.txt': g5505f_reader.read_txt_files_as_dict,
-                          '.dat': g5505f_reader.read_txt_files_as_dict,
-                          '.h5': g5505f_reader.copy_file_in_group}
-elif usecase == 3:
-    user_initials = 'LL'
-    outputfile_dir = 'output_files'
-    output_filename = output_filename_tempate(group_id,created_at,user_initials)
-    
-    inputfile_dir = '//fs101/5505/Data'
-    
-    #select_dir_keywords = ['Lopap', 'Humidity_Sensors', 'ICAD/HONO', 'ICAD/NO2', 'T200_NOX', 'T360U_CO2']
-    # TODO: make sure in the code composite keywords are broken down into single keywords
-
-    ##select_dir_keywords = ['Humidity_Sensors','ICAD/HONO','ICAD/NO2']
-    select_dir_keywords = ['Humidity_Sensors/2022','ICAD/HONO/2022','ICAD/NO2/2022', '2022/01_Jan', '2022/02_Feb', '2022/03_März']
-    
-    dates = pd.read_excel(os.path.abspath(os.path.join('input_files','date_experiments_for Juan.xlsx')))
-
-    select_file_keywords=[item.strftime('%Y-%m-%d') for item in dates.loc[0:2,'experiment_date']]
-    select_file_keywords= select_file_keywords + [item.strftime('%Y%m%d') for item in dates.loc[0:2,'experiment_date']]
-
-    ext_to_reader_dict = {'.ibw': g5505f_reader.read_xps_ibw_file_as_dict,
-                          '.txt': g5505f_reader.read_txt_files_as_dict,
-                          '.dat': g5505f_reader.read_txt_files_as_dict,
-                          '.h5': g5505f_reader.copy_file_in_group}
-    
+    return ext_to_reader_dict