diff --git a/cfg/openBC.cfg b/cfg/openBC.cfg
index 24b64ab..df25a65 100755
--- a/cfg/openBC.cfg
+++ b/cfg/openBC.cfg
@@ -41,18 +41,18 @@ man_fan_forward_gpio = 4
 reset_gpio = 5
 
 [timers]
-block_time = 100
+block_time = 52
 block_time_idle = 300
 run_time_fan_idle = 30
-run_time_screw = 3
+run_time_screw = 5
 run_time_screw_idle = 5
 log_block_time = 15
 
 [limits]
-tank_set_temp = 30
-boiler_set_temp = 85
-fire_set_temp = 300
-lambda_set_value = 1.34
+tank_set_temp = 19
+boiler_set_temp = 35
+fire_set_temp = 90
+lambda_set_value = 0.92
 idle_fire_set_temp = 200
 
 [fan]
diff --git a/gui.py b/gui.py
index 77d383c..eb84689 100755
--- a/gui.py
+++ b/gui.py
@@ -13,9 +13,8 @@
 CFG_FILE = "openBC.cfg"
 CFG = os.path.dirname(os.path.abspath(__file__)) + CFG_PATH + CFG_FILE
 
-OB = OpenBCcfg(CFG) # Read config file.
-OB.readConfigFile()
 
+OB = OpenBCcfg(CFG) # Read config file.
 #################################################################
 ######################### GUI ###################################
 #################################################################
@@ -38,19 +37,23 @@ def task():
 
 
 def GetScaleValues():
+	
+	OB.readConfigFile()
 	tScaleInt.set(int(OB.TANK_SET_TEMP))
 	bScaleInt.set(int(OB.BOILER_SET_TEMP))
 	fScaleInt.set(int(OB.FIRE_SET_TEMP))
 	lScaleFloat.set(float(OB.LAMBDA_SET_VALUE))
+	blockTimeInt.set(int(OB.BLOCK_TIME))
+	screwRuntimeInt.set(int(OB.RUN_TIME_SCREW))
 
 def SetScaleValues():
-	config = ConfigParser.RawConfigParser()
-	config.set('limits', 'tank_set_temp', '15')
-	config.set('limits', 'boiler_set_temp', '40')
-	config.set('limits', 'fire_set_temp', '300')
-	config.set('limits', 'lambda_set_value', '1.34')
-	with open(CFG, 'ab') as configfile:
-		config.write(configfile)
+	OB.TANK_SET_TEMP = str(tScaleInt.get())
+	OB.BOILER_SET_TEMP = str(bScaleInt.get())
+	OB.FIRE_SET_TEMP = str(fScaleInt.get())
+	OB.LAMBDA_SET_VALUE = str(lScaleFloat.get())
+	OB.BLOCK_TIME  = str(blockTimeInt.get())
+	OB.RUN_TIME_SCREW = str(screwRuntimeInt.get())
+	OB.WriteConfigFile()
 
 # ----------- GUI ROOT ------------ #
 
@@ -69,6 +72,8 @@ def SetScaleValues():
 bScaleInt = IntVar()
 fScaleInt = IntVar()
 lScaleFloat = DoubleVar()
+blockTimeInt = IntVar()
+screwRuntimeInt = IntVar()
 
 
 tTempVar.set(0)
@@ -125,43 +130,41 @@ def SetScaleValues():
 
 # ---------- Slides ------------- #
 
-tankLabel = Label(settings, font=("Helvetica", 14), text="Tank target ℃")
+tankLabel = Label(settings, font=("Helvetica", 13), text="Tank target ℃")
 tankLabel.grid(sticky=SE, row=0, column=0)
-
 tankScale = Scale(settings, variable=tScaleInt, takefocus=0, from_=0, to=100, length=600, width="25", orient=HORIZONTAL)
-
 tankScale.grid(padx=20, pady=0,row=0, column=1)
 #########
-boilerLabel = Label(settings, font=("Helvetica", 14), text="Boiler target ℃")
+boilerLabel = Label(settings, font=("Helvetica", 13), text="Boiler target ℃")
 boilerLabel.grid(sticky=SE, row=1, column=0)
-
 boilerScale = Scale(settings, variable=bScaleInt, takefocus=0, from_=0, to=100, length=600, width="25", orient=HORIZONTAL)
-
 boilerScale.grid(padx=20, pady=0,row=1, column=1)
 ##########
-fireLabel = Label(settings, font=("Helvetica", 14), text="Fire target ℃")
+fireLabel = Label(settings, font=("Helvetica", 13), text="Fire target ℃")
 fireLabel.grid(sticky=SE, row=2, column=0)
-
 fireScale = Scale(settings, variable=fScaleInt, takefocus=0, from_=0, to=800, length=600, width="25", orient=HORIZONTAL)
-
 fireScale.grid(padx=20, pady=0,row=2, column=1)
 ##########
-lambdaLabel = Label(settings, font=("Helvetica", 14), text="Lambda target λ")
+lambdaLabel = Label(settings, font=("Helvetica", 13), text="Lambda target λ")
 lambdaLabel.grid(sticky=SE, row=3, column=0)
-
 lambdaScale = Scale(settings, variable=lScaleFloat, takefocus=0, from_=0.65, to=1.6, resolution=0.02, length=600, width="25", orient=HORIZONTAL)
-
 lambdaScale.grid(padx=20, pady=0,row=3, column=1)
-
-
-setButton = Button(settings, command=SetScaleValues, text='SET')
-#setButton.pack(side='left', anchor='nw', padx=3, pady=5)
-setButton.grid(sticky=SE, padx=5, pady=25, row=4, column=0)
-
-setButton = Button(settings, command=GetScaleValues, text='GET')
-#setButton.pack(side='left', anchor='nw', padx=3, pady=5)
-setButton.grid(sticky=SW, padx=5, pady=25, row=4, column=0)
-
+##########
+blockTimeLabel = Label(settings, font=("Helvetica", 13), text="Block time screw(s)")
+blockTimeLabel.grid(sticky=SE, row=4, column=0)
+blockTimeScale = Scale(settings, variable=blockTimeInt, takefocus=0, from_=0, to=800, length=600, width="25", orient=HORIZONTAL)
+blockTimeScale.grid(padx=20, pady=0,row=4, column=1)
+###########
+screwRuntimeLabel = Label(settings, font=("Helvetica", 13), text="Screw run time(s)")
+screwRuntimeLabel.grid(sticky=SE, row=5, column=0)
+screwRuntimeScale = Scale(settings, variable=screwRuntimeInt, takefocus=0, from_=0, to=20, length=600, width="25", orient=HORIZONTAL)
+screwRuntimeScale.grid(padx=20, pady=0,row=5, column=1)
+###########
+setButton = Button(settings, command=SetScaleValues, text='Set')
+setButton.grid(sticky=SE, padx=5, pady=25, row=6, column=0)
+##########
+setButton = Button(settings, command=GetScaleValues, text='Undo')
+setButton.grid(sticky=SW, padx=5, pady=25, row=6, column=0)
 # ------------------------------- #
 
 
diff --git a/openbccfg.py b/openbccfg.py
index 2ec83c5..0d31642 100755
--- a/openbccfg.py
+++ b/openbccfg.py
@@ -3,11 +3,9 @@
 class OpenBCcfg(object):
 
 	def __init__(self, file_name):
-
 		self.config = ConfigParser.RawConfigParser()
 		self.file_name = file_name
-		
-	
+			
 	def readConfigFile(self):
 		self.config.read(self.file_name)
 
@@ -46,16 +44,14 @@ def readConfigFile(self):
 		self.BUTTON_MAN_SCREW_BACKWARD = self.config.get("control_button", "man_screw_backward_gpio")
 		self.BUTTON_MAN_FAN_FORWARD = self.config.get("control_button", "man_fan_forward_gpio")
 		self.BUTTON_RESET = self.config.get("control_button", "reset_gpio")
-		
-		
+				
 		self.BLOCK_TIME = self.config.get("timers", "block_time")
 		self.BLOCK_TIME_IDLE = self.config.get("timers", "block_time_idle")
 		self.RUN_TIME_FAN_IDLE = self.config.get("timers", "run_time_fan_idle")
 		self.RUN_TIME_SCREW = self.config.get("timers", "run_time_screw")
 		self.RUN_TIME_SCREW_IDLE = self.config.get("timers", "run_time_screw_idle")
 		self.LOG_BLOCK_TIME = self.config.get("timers", "log_block_time")
-		
-		
+				
 		self.TANK_SET_TEMP = self.config.get("limits", "tank_set_temp")
 		self.BOILER_SET_TEMP = self.config.get("limits", "boiler_set_temp")
 		self.FIRE_SET_TEMP = self.config.get("limits", "fire_set_temp")
@@ -80,8 +76,6 @@ def readConfigFile(self):
 		self.LOG_FILE_NAME = self.config.get("log", "file_name")
 
 	def WriteConfigFile(self):
-
-		
 		self.config.set('info', 'hw_name', self.HW_NAME)
 		self.config.set('info', 'ip', self.IP)
 		self.config.set('info', 'evok_url', self.EVOK_URL)
@@ -98,12 +92,10 @@ def WriteConfigFile(self):
 		self.config.set('tank_temp_sensor', 'file_name', self.TANK_TEMP_SENSOR_FILE_NAME)
 		self.config.set('tank_temp_sensor', 'id', self.TANK_TEMP_SENSOR_ID)
 
-
 		self.config.set('fire_temp_sensor', 'enabled', self.FIRE_TEMP_SENSOR_ENABLED)
 		self.config.set('fire_temp_sensor', 'type', self.FIRE_TEMP_SENSOR_TYPE)
 		self.config.set('fire_temp_sensor', 'analog_pin', self.FIRE_TEMP_SENSOR_ANALOG_PIN)
 
-
 		self.config.set('lambda_sensor', 'enabled', self.LAMBDA_SENSOR_ENABLED)
 		self.config.set('lambda_sensor', 'type', self.LAMBDA_SENSOR_TYPE)
 		self.config.set('lambda_sensor', 'port', self.LAMBDA_SENSOR_PORT)
@@ -112,7 +104,6 @@ def WriteConfigFile(self):
 		self.config.set('lambda_sensor', 'analog_pin', self.LAMBDA_SENSOR_ANALOG_PIN)
 		self.config.set('lambda_sensor', 'contactor_pin', self.LAMBDA_SENSOR_CONTACTOR_PIN)
 
-
 		self.config.set('control_button', 'contactor_pin', self.BUTTON_CONTACTOR_PIN)
 		self.config.set('control_button', 'emergency_stop_gpio', self.BUTTON_EMERGENCY_STOP)
 		self.config.set('control_button', 'auto_man_gpio', self.BUTTON_AUTO_MAN)
@@ -121,7 +112,6 @@ def WriteConfigFile(self):
 		self.config.set('control_button', 'man_fan_forward_gpio', self.BUTTON_MAN_FAN_FORWARD)
 		self.config.set('control_button', 'reset_gpio', self.BUTTON_RESET)
 
-
 		self.config.set('timers', 'block_time', self.BLOCK_TIME)
 		self.config.set('timers', 'block_time_idle', self.BLOCK_TIME_IDLE)
 		self.config.set('timers', 'run_time_fan_idle', self.RUN_TIME_FAN_IDLE)
@@ -129,26 +119,22 @@ def WriteConfigFile(self):
 		self.config.set('timers', 'run_time_screw_idle', self.RUN_TIME_SCREW_IDLE)
 		self.config.set('timers', 'log_block_time', self.LOG_BLOCK_TIME)
 
-
 		self.config.set('limits', 'tank_set_temp', self.TANK_SET_TEMP)
 		self.config.set('limits', 'boiler_set_temp', self.BOILER_SET_TEMP)
 		self.config.set('limits', 'fire_set_temp', self.FIRE_SET_TEMP)
 		self.config.set('limits', 'lambda_set_value', self.LAMBDA_SET_VALUE)
 		self.config.set('limits', 'idle_fire_set_temp', self.IDLE_FIRE_SET_TEMP)
 
-
 		self.config.set('fan', 'enabled', self.FAN_ENABLED)
 		self.config.set('fan', 'type', self.FAN_TYPE)
 		self.config.set('fan', 'analog_pin', self.FAN_ANALOG_PIN)
 		self.config.set('fan', 'safe_mode_speed', self.FAN_SAFE_MODE_SPEED)
 		self.config.set('fan', 'contactor_pin', self.FAN_CONTACTOR_PIN)
 
-
 		self.config.set('screw', 'enabled', self.SCREW_ENABLED)
 		self.config.set('screw', 'type', self.SCREW_TYPE)
 		self.config.set('screw', 'contactor_pin', self.SCREW_CONTACTOR_PIN)
 
-
 		self.config.set('database', 'enabled', self.DATABASE_ENABLED)
 		self.config.set('database', 'type', self.DATABASE_TYPE)
 		self.config.set('database', 'db_name', self.DATABASE_NAME)