diff --git a/CITATION.cff b/CITATION.cff
new file mode 100644
index 0000000..e69de29
diff --git a/LICENSE b/LICENSE
index ebbe802..a229cba 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,3 +1,4 @@
+Copyright (c) 2024 Oriol Cayon, Jelle Poland, TU Delft
 Copyright (c) 2022 Oriol Cayon, TU Delft 
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
diff --git a/polars/clarky.csv b/data/polars/clarky.csv
similarity index 100%
rename from polars/clarky.csv
rename to data/polars/clarky.csv
diff --git a/case_rectangular_wing_inviscid.py b/old_code/case_rectangular_wing_inviscid.py
similarity index 98%
rename from case_rectangular_wing_inviscid.py
rename to old_code/case_rectangular_wing_inviscid.py
index a6307ad..ccb7754 100644
--- a/case_rectangular_wing_inviscid.py
+++ b/old_code/case_rectangular_wing_inviscid.py
@@ -15,7 +15,7 @@
 import numpy as np
 import matplotlib.pyplot as plt
 import time
-import functions_VSM_LLT as VSM
+import src.functions_VSM_LLT as VSM
 plt.rcParams.update({'font.size': 14})
 #%%  Input DATA
 N = 50
diff --git a/case_rectangular_wing_viscous.py b/old_code/case_rectangular_wing_viscous.py
similarity index 98%
rename from case_rectangular_wing_viscous.py
rename to old_code/case_rectangular_wing_viscous.py
index c6d833c..c43c084 100644
--- a/case_rectangular_wing_viscous.py
+++ b/old_code/case_rectangular_wing_viscous.py
@@ -15,13 +15,7 @@
 import numpy as np
 import matplotlib.pyplot as plt
 import time
-import sys
-sys.path.insert(0, '../functions/')
-import functions_VSM_LLT as VSM
-
-
-    
-    
+import src.functions_VSM_LLT as VSM
     
 plt.close('all')
 #%%  Input DATA
diff --git a/src/functions_VSM_LLT.py b/old_code/functions_VSM_LLT.py
similarity index 99%
rename from src/functions_VSM_LLT.py
rename to old_code/functions_VSM_LLT.py
index 4d94ade..50482b0 100644
--- a/src/functions_VSM_LLT.py
+++ b/old_code/functions_VSM_LLT.py
@@ -1552,31 +1552,6 @@ def refine_LEI_mesh(coord,N_sect,N_split):
  
 
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-  
-
 # %% FUNCTIONS NOT CURRENTLY USED
 
 def velocity_3D_from_vortex_filament(XV1,XV2,XVP,GAMMA,CORE):
diff --git a/v3_LEI_kite/CFD_data/CFD_data.csv b/old_code/v3_LEI_kite/CFD_data/CFD_data.csv
similarity index 100%
rename from v3_LEI_kite/CFD_data/CFD_data.csv
rename to old_code/v3_LEI_kite/CFD_data/CFD_data.csv
diff --git a/v3_LEI_kite/CFD_data/RANS_CD_alpha_struts.csv b/old_code/v3_LEI_kite/CFD_data/RANS_CD_alpha_struts.csv
similarity index 100%
rename from v3_LEI_kite/CFD_data/RANS_CD_alpha_struts.csv
rename to old_code/v3_LEI_kite/CFD_data/RANS_CD_alpha_struts.csv
diff --git a/v3_LEI_kite/CFD_data/RANS_CL_alpha_struts.csv b/old_code/v3_LEI_kite/CFD_data/RANS_CL_alpha_struts.csv
similarity index 100%
rename from v3_LEI_kite/CFD_data/RANS_CL_alpha_struts.csv
rename to old_code/v3_LEI_kite/CFD_data/RANS_CL_alpha_struts.csv
diff --git a/v3_LEI_kite/main_v3kite.py b/old_code/v3_LEI_kite/main_v3kite.py
similarity index 99%
rename from v3_LEI_kite/main_v3kite.py
rename to old_code/v3_LEI_kite/main_v3kite.py
index 40f4636..ee2ee34 100644
--- a/v3_LEI_kite/main_v3kite.py
+++ b/old_code/v3_LEI_kite/main_v3kite.py
@@ -8,7 +8,7 @@
 import numpy as np
 import matplotlib.pyplot as plt
 import time
-import functions_VSM_LLT as VSM
+import src.functions_VSM_LLT as VSM
 
 
 
diff --git a/wing_polar_rect_wing_viscous.py b/old_code/wing_polar_rect_wing_viscous.py
similarity index 98%
rename from wing_polar_rect_wing_viscous.py
rename to old_code/wing_polar_rect_wing_viscous.py
index e1f5651..087ac62 100644
--- a/wing_polar_rect_wing_viscous.py
+++ b/old_code/wing_polar_rect_wing_viscous.py
@@ -3,7 +3,7 @@
 import time
 import sys
 sys.path.insert(0, '../functions/')
-import functions_VSM_LLT as VSM
+import src.functions_VSM_LLT as VSM
 
 
     
@@ -36,7 +36,7 @@
     'Niterations': 3000,
     'error' : 1e-6,
     'Relax_factor': 0.01,  
-    'k2': 0.05,
+    'k2': 0.0,
     'k4': 0.0   
     }
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..e69de29
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e69de29