diff --git a/src/python/cpr-test.py b/src/python/cpr-test.py
index 43782c8..eaf7064 100755
--- a/src/python/cpr-test.py
+++ b/src/python/cpr-test.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 #
 # Copyright 2010 Nick Foster
 # 
@@ -19,9 +20,6 @@
 # Boston, MA 02110-1301, USA.
 # 
 
-
-#!/usr/bin/env python
-
 from modes_parse import *
 from cpr import *
 import sys
diff --git a/src/python/modes_print.py b/src/python/modes_print.py
index 304ce52..284cb3f 100644
--- a/src/python/modes_print.py
+++ b/src/python/modes_print.py
@@ -29,8 +29,6 @@ class modes_output_print(modes_parse.modes_parse):
   def parse(self, message):
     [msgtype, shortdata, longdata, parity, ecc, reference] = message.split()
 
-    if reference is None: reference = 0
-
     shortdata = long(shortdata, 16)
     longdata = long(longdata, 16)
     parity = long(parity, 16)
@@ -54,7 +52,13 @@ class modes_output_print(modes_parse.modes_parse):
     else:
       output = "No handler for message type " + str(msgtype) + " from " + str(ecc)
 
-    output = "(%.0f) " % (10.0*math.log10(float(reference))) + output
+
+    if reference == 0:
+        refdb = 0
+    else:
+        refdb = 10.0*math.log10(reference)
+        
+    output = "(%.0f) " % (refdb) + output
 
     print output
 
diff --git a/src/python/modes_sql.py b/src/python/modes_sql.py
index 89a6cc6..f8f312f 100644
--- a/src/python/modes_sql.py
+++ b/src/python/modes_sql.py
@@ -25,9 +25,9 @@ import modes_parse
 import sqlite3
 
 class modes_output_sql(modes_parse.modes_parse):
-  def __init__(self):
+  def __init__(self, filename):
     #create the database
-    self.db = sqlite3.connect('adsb.db')
+    self.db = sqlite3.connect(filename)
     #now execute a schema to create the tables you need
     c = self.db.cursor()
     query = """CREATE TABLE IF NOT EXISTS "positions" (
diff --git a/src/python/uhd_modes.py b/src/python/uhd_modes.py
index 839701e..12ca79f 100755
--- a/src/python/uhd_modes.py
+++ b/src/python/uhd_modes.py
@@ -149,7 +149,7 @@ if __name__ == '__main__':
   updates = [] #registry of plugin update functions
 
   if options.kml is not None:
-    sqlport = modes_output_sql() #create a SQL parser to push stuff into SQLite
+    sqlport = modes_output_sql('adsb.db') #create a SQL parser to push stuff into SQLite
     outputs.append(sqlport.insert)
     #also we spawn a thread to run every 30 seconds (or whatever) to generate KML
     kmlgen = modes_kml('adsb.db', options.kml) #create a KML generating thread which reads the database
@@ -178,8 +178,8 @@ if __name__ == '__main__':
         while queue.empty_p() == 0 :
           msg = queue.delete_head() #blocking read
 
-	  for out in outputs:
-	    out(msg.to_string())
+        for out in outputs:
+            out(msg.to_string())
 
       elif runner.done:
         raise KeyboardInterrupt