diff --git a/README.md b/README.md
index 997946b..d5b0fb9 100644
--- a/README.md
+++ b/README.md
@@ -185,6 +185,31 @@
   is beyond the range of the timer to correct, you will hear
   5 short beeps repeated.
 
+## Calibration And Tuning
+
+The timer should pretty much be ready to run "out of the box".  But,
+here are a few ideas on how it can be tuned or adjusted:
+
+* VERY IMPORTANT: Do **NOT** run the timer with `DEBUG = True`. This
+  option is for the sofware developer only and introduces extra
+  output that *makes the timer less accurate*.  So, unless you are
+  hacking on the hardware or software, leave this set to `False`.
+
+* The `CALIBRATION_OFFSET` variable is designed to help compensate for
+  the amount of time the master timing loop needs to run on your
+  particular platform.  The default value should be about right for a
+  Raspberry Pi Zero.  If you use a different platform or overclock
+  your Pi, you may wish to adjust this to calibrate the timer.  This
+  is best done by running the timer in realtime mode (no temperature
+  compensation), adjusting this variable and seeing how the timer
+  speed compares to a known good reference timer.
+
+* You can adjust the individual compensation entries for film or paper
+  to your liking. The values there are pretty good first
+  approximations based a fair bit of research, but you can "tweak"
+  them to suit your style of photography and film development.
+
+
 ## Help & Support
 
 There isn't any.  You can send mail to `devtimer@tundraware.com` and I'll
diff --git a/devtimer.py b/devtimer.py
index 0caf1ce..a940aaa 100755
--- a/devtimer.py
+++ b/devtimer.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # devtimer.py - Temperature Controlled Photographic Darkroom Timer
 # Targeted for RaspberryPi
-# Copyright (c) 2018-2020 TundraWare Inc.
+# Copyright (c) 2018-2021 TundraWare Inc.
 # Permission Hereby Granted For Unrestricted Personal Or Commercial Use
 # Code Repo Here: https://gitbucket.tundraware.com/tundra/devtimer
 
@@ -24,7 +24,7 @@
 # Constants
 #####
 
-DEBUG = True                # Debugging switch
+DEBUG = False                # Debugging switch
 
 # GPIO Ports And Other Hardware Constants