diff --git a/devtimer.py b/devtimer.py
index 601b84b..45276ef 100755
--- a/devtimer.py
+++ b/devtimer.py
@@ -26,23 +26,33 @@
 DEBUG = True                  # Debugging switch
 
 BEEP = 15                     # Beep interval
-CALIBRATION_OFFSET = 0.0022   # Compensate for program overhead in master loop
-NORMAL_TEMP = 68              # Reference temperature in degrees F
+CALIBRATION_OFFSET = 0.002    # Compensate for program overhead in master loop
 
+# Profile Constants
+
+REALTIME = 0
+PAPER = 1
+FILM = 2
+
+
+# Globals (So shoot me ...)
+# These get updated by the thereads reading the switches and thermocouple
+
+CURRENT_PROFILE = FILM
+CURRENT_TEMP = 20        # Stored as index relative to 60F
 
 #####
 # Lookup Table For Compensating Factors
 #####
 
 '''
-  Each paper|film-developer combo has an entry here, expressed as:
+  There are 3 tables in the list below.  In order:
 
-    +- correction/degree
+      Realtime
+      Paper
+      Film
 
-  68F is considered "normal".  Temperatures below this will cause the
-  timer to run slower. Temperatures above it, will cause the timer to
-  run faster.  This creates a "virtual second" that reflect time,
-  material, and developer selected.
+  Each contains entires   for muliplicative corrections from 60F to 80F.
 
   WARNING: It takes about 250ms to update the display on a Pi Zero.
            So, if the "virtual second" falls at or below this, the
@@ -53,29 +63,18 @@
 '''
 
 compensate = (
-               0.000,     # Normal
-               0.010,     # Small temperature dependency
-               0.040,     # Medium temperature dependency
-               0.100,     # Large temperature dependency
+              (1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000, 1.000),
+              (1.724, 1.611, 1.505, 1.406, 1.313, 1.227, 1.146, 1.070, 1.000, 0.934, 0.873, 0.815, 0.762, 0.711, 0.665, 0.621, 0.580, 0.542, 0.506, 0.473, 0.442),
+              (1.445, 1.380, 1.318, 1.259, 1.202, 1.148, 1.096, 1.047, 1.000, 0.955, 0.912, 0.871, 0.832, 0.795, 0.759, 0.725, 0.692, 0.661, 0.631, 0.603, 0.576)
              )
 
+
 # Beep at the user at fixed intervals
 
 def beep():
     print("Beep!")
 
 
-# Get currently selected media/developer profile
-
-def get_profile():
-    return 0
-
-# Return the current temperature in degrees F
-
-def get_temp():
-    return 72
-
-
 # Update the display with elapsed time
 
 def show_elapsed(display0, elapsed):
@@ -88,7 +87,9 @@
     d3 = display0.digit_to_segment[sec % 10]
     display0.set_segments([d0, 0x80 + d1, d2, d3])
 
+#####
 # Program entry point
+#####
 
 '''
   Notice that the actual updating of the display gets run on its own
@@ -119,7 +120,7 @@
             last = time()
 
         update_thread = Thread(None, show_elapsed, None, (display0, elapsed_time))
-        sleep(1.000 + ((NORMAL_TEMP-get_temp()) * compensate[get_profile()]) - CALIBRATION_OFFSET)
+        sleep(compensate[CURRENT_PROFILE][CURRENT_TEMP] - CALIBRATION_OFFSET)
         elapsed_time += 1
         elapsed_time %= 6000
         update_thread = Thread(None, show_elapsed, None, (display0, elapsed_time))