diff --git a/PyLoT.py b/PyLoT.py
index f02fd377..c9e67b9c 100755
--- a/PyLoT.py
+++ b/PyLoT.py
@@ -470,7 +470,8 @@ class MainWindow(QMainWindow):
                                                   icon=qualities_icon, tip='Histogram of pick qualities')
         self.qualities_action.setEnabled(False)
         # MP MP not yet implemented, therefore hide:
-        self.qualities_action.setVisible(False)
+        # LK will be implemented soon, basic script has already (03/2021) been finished
+        self.qualities_action.setVisible(True)
 
         printAction = self.createAction(self, "&Print event ...",
                                         self.show_event_information, QKeySequence.Print,
@@ -1501,11 +1502,11 @@ class MainWindow(QMainWindow):
         :param outformats: str/list of output formats
         :return:
         '''
-	if not event:
+        if not event:
             event = self.get_current_event()
         if not type(outformats) == list:
             outformats = [outformats]
-	def getSavePath(event, directory, outformats):
+        def getSavePath(event, directory, outformats):
             if not directory:
                 title = 'Save event data as {} to directory ...'.format(outformats)
                 directory = QFileDialog.getExistingDirectory(self,
@@ -1523,8 +1524,8 @@ class MainWindow(QMainWindow):
 
         uppererrorP = self._inputs['timeerrorsP']
         uppererrorS = self._inputs['timeerrorsS']
-	# Inserted to prevent Bug in Eventlist
-	self.get_data().setEvtData(event)
+        # Inserted to prevent Bug in Eventlist
+        self.get_data().setEvtData(event)
         try:
             self.get_data().applyEVTData(event, typ='event')  # getPicks())
         except OverwriteError:
@@ -3023,7 +3024,7 @@ class MainWindow(QMainWindow):
         outfile = parameter['outpatter']
         eventname = self.get_current_event_name()
         obsdir = os.path.join(self._inputs['rootpath'], self._inputs['datapath'], self._inputs['database'], eventname)
-	self.saveData(event=self.get_current_event(), directory=obsdir, outformats='.obs')
+        self.saveData(event=self.get_current_event(), directory=obsdir, outformats='.obs')
         filename = 'PyLoT_' + eventname
         locpath = os.path.join(locroot, 'loc', filename)
         phasefile = os.path.join(obsdir, filename + '.obs')
@@ -3756,7 +3757,7 @@ class Project(object):
         self.search_eventfile_info()
 
     def remove_event(self, event):
-	self.eventlist.remove(event)
+        self.eventlist.remove(event)
 
     def remove_event_by_id(self, eventID):
         for event in self.eventlist:
@@ -3765,7 +3766,7 @@ class Project(object):
                 break
 
     def read_eventfile_info(self, filename, separator=','):
-	'''
+        '''
         Try to read event information from file (:param:filename) comparing specific event datetimes.
         File structure (each row): event, date, time, magnitude, latitude, longitude, depth
         separated by :param:separator each.
diff --git a/pylot/core/analysis/magnitude.py b/pylot/core/analysis/magnitude.py
index dc5204ed..40e98a48 100644
--- a/pylot/core/analysis/magnitude.py
+++ b/pylot/core/analysis/magnitude.py
@@ -221,15 +221,15 @@ class LocalMagnitude(Magnitude):
 
         power = [np.power(tr.data, 2) for tr in st if tr.stats.channel[-1] not
                  in 'Z3']
-	# checking horizontal count and calculating power_sum accordingly
-	if len(power) == 1:
-		print ('WARNING: Only one horizontal found for station {0}.'.format(st[0].stats.station))
-		power_sum = power[0]
-	elif len(power) == 2:
-		power_sum = power[0] + power[1]
-	else: 
-		raise ValueError('Wood-Anderson aomplitude defintion only valid for'
-			' up to two horizontals: {0} given'.format(len(power)))
+        # checking horizontal count and calculating power_sum accordingly
+        if len(power) == 1:
+                print ('WARNING: Only one horizontal found for station {0}.'.format(st[0].stats.station))
+                power_sum = power[0]
+        elif len(power) == 2:
+                power_sum = power[0] + power[1]
+        else: 
+                raise ValueError('Wood-Anderson aomplitude defintion only valid for'
+                        ' up to two horizontals: {0} given'.format(len(power)))
  
         sqH = np.sqrt(power_sum)
 
diff --git a/pylot/core/io/data.py b/pylot/core/io/data.py
index e497783b..87434a3c 100644
--- a/pylot/core/io/data.py
+++ b/pylot/core/io/data.py
@@ -275,7 +275,7 @@ class Data(object):
         # check for already existing xml-file
         if fnext == '.xml':
             if os.path.isfile(fnout + fnext):
-            	print("xml-file already exists! Check content ...")
+                print("xml-file already exists! Check content ...")
                 cat = read_events(fnout + fnext)
                 if len(cat) > 1:
                     raise IOError('Ambigious event information in file {}'.format(fnout + fnext))
@@ -287,7 +287,7 @@ class Data(object):
                     return
                 self.checkEvent(event, fcheck)
                 self.setEvtData(event)
-		
+                
             self.get_evt_data().write(fnout + fnext, format=evtformat)
 
         # try exporting event
diff --git a/pylot/core/io/phases.py b/pylot/core/io/phases.py
index 30d26ffc..8442ed7f 100644
--- a/pylot/core/io/phases.py
+++ b/pylot/core/io/phases.py
@@ -805,7 +805,7 @@ def writephases(arrivals, fformat, filename, parameter=None, eventinfo=None):
             return
         stime = eventsource['time']
         event = parameter.get('eventID')
-	hddID = event.split('.')[0][1:5]	
+        hddID = event.split('.')[0][1:5]        
         # write header
         fid.write('# %d  %d %d %d %d %5.2f %7.4f +%6.4f %7.4f %4.2f 0.1 0.5 %4.2f      %s\n' % (
             stime.year, stime.month, stime.day, stime.hour, stime.minute, stime.second,