diff --git a/GasFill_GUI.py b/GasFill_GUI.py
index 8eefb08923358f663eb83644d1ece6dd4dcf15b0..7d0da7dcdc4a90c173fb485b4027b0b3201274f9 100644
--- a/GasFill_GUI.py
+++ b/GasFill_GUI.py
@@ -9,9 +9,7 @@ __version__ = "1.0"
 
 #Packages
 import numpy
-import math
-from scipy import constants
-from PyQt5.QtWidgets import (QWidget, QHBoxLayout, QPushButton, QLabel, QApplication, QGridLayout, QCheckBox, QRadioButton, QFileDialog, QLineEdit, QSlider, QGroupBox, QVBoxLayout)
+from PyQt5.QtWidgets import (QWidget, QHBoxLayout, QPushButton, QLabel, QApplication, QGridLayout, QFileDialog, QLineEdit, QGroupBox, QVBoxLayout)
 from PyQt5.QtGui import (QPixmap, QIntValidator, QDoubleValidator, QPalette)
 from PyQt5.QtCore import Qt
 import sys
@@ -19,8 +17,9 @@ import GasFill_times
 
 
 #fiber variables
-dia_tube = 0.02 #(mm) capillary diameter
+dia_tube = 0.20 #(mm) capillary diameter
 len_tube = 2.7 #(m)
+
 #gas variables
 P = 10 #(mbar) average pressure inside capillary
 mW = 28.97 #(g/mol)
diff --git a/GasFill_times.py b/GasFill_times.py
index be857ee285cbf2aab7bdd42fa86835eb7ff6da61..d62c2820a963fa9e59452dcfe2c9e37176a9f2e3 100644
--- a/GasFill_times.py
+++ b/GasFill_times.py
@@ -11,12 +11,12 @@ __version__ = "0.1"
 
 #Pacakges
 import numpy
-import math
-import fluids
-from scipy import constants
 
+#Gas fill times function
 def filltime (dia_tube,len_tube,P,mW,temp,dia_mol):
 	
+	boltzmann = 1.38064852e-23
+
 	#varable scale fixing
 	rad_tube = dia_tube/2 #(mm)
 	P = P*100 #(PA) average pressure inside capillary
@@ -29,7 +29,7 @@ def filltime (dia_tube,len_tube,P,mW,temp,dia_mol):
 	mM = mW / 6.02214e23 #(kg)
 
 	#Knudsen number ---------------
-	lamda = constants.Boltzmann*temp / (numpy.sqrt(2)*numpy.pi*Pav*numpy.power(dia_mol,2)) #from "Analytical modeling of the gas-filling dynamics in photonic crystal fibers"
+	lamda = boltzmann*temp / (numpy.sqrt(2)*numpy.pi*Pav*numpy.power(dia_mol,2)) #from "Analytical modeling of the gas-filling dynamics in photonic crystal fibers"
 
 	#Kn = lamda/(Pav*dia_tube) #from "Flow of gases through tubes and orifices" where lamda = 0.066 for air at 20 deg
 	Kn = lamda/rad_tube #from others
@@ -37,7 +37,7 @@ def filltime (dia_tube,len_tube,P,mW,temp,dia_mol):
 
 
 	#Diffusion coefficent ---------------
-	mol_vel =  numpy.sqrt((8*constants.Boltzmann*temp)/(numpy.pi*mM)) #mean molecular velocity
+	mol_vel =  numpy.sqrt((8*boltzmann*temp)/(numpy.pi*mM)) #mean molecular velocity
 	viscosity = (mol_vel*mM)/(2*numpy.sqrt(2)*numpy.pi*numpy.power(dia_mol,2))
 	print ("Viscosity: "+ str(round(viscosity,3)))
 
@@ -47,7 +47,7 @@ def filltime (dia_tube,len_tube,P,mW,temp,dia_mol):
 
 	#Fill time  ---------------
 	squigle = 2
-	Ppercent = 85 #percent ratio
+	Ppercent = 1 #percent ratio
 	Pred = P/100*Ppercent
 	Pratio = P/(P-Pred)
 	t_fill = (numpy.power((squigle*len_tube),2) / (numpy.power(numpy.pi,2)*diff_coeff))*numpy.log((numpy.power(numpy.pi,2)/8)*Pratio)
@@ -57,17 +57,16 @@ def filltime (dia_tube,len_tube,P,mW,temp,dia_mol):
 
 
 if __name__ == '__main__':
-#Variables ---------------
 
     #fiber variables
-    dia_tube = 0.02 #(mm) capillary diameter
-    len_tube = 2.7 #(m)
+    dia_tube = 0.0005 #(mm) capillary diameter
+    len_tube = 2 #(m)
+    
     #gas variables
-    P = 10 #(mbar) average pressure inside capillary
+    P = 3.5 #(mbar) average pressure inside capillary
     mW = 26.04 #(g/mol)
     temp = 21 #(degC) Temperature of system
     dia_mol = 359.99 #(pm) diameter of gas molecule
-    # execute only if run as the entry point into the program
     
     filltime(dia_tube,len_tube,P,mW,temp,dia_mol)
 
diff --git a/__pycache__/GasFill_times.cpython-36.pyc b/__pycache__/GasFill_times.cpython-36.pyc
index e22bd5df34e4a4b0fd67e037d219eeccfb8c4f07..91e0f44e6f00e5c75fd02f0b6f15e040f8c7e491 100644
Binary files a/__pycache__/GasFill_times.cpython-36.pyc and b/__pycache__/GasFill_times.cpython-36.pyc differ