diff --git a/Cosmic_Pi_Talk_2021.md b/Cosmic_Pi_Talk_2021.md
index 0724b71..23239c4 100644
--- a/Cosmic_Pi_Talk_2021.md
+++ b/Cosmic_Pi_Talk_2021.md
@@ -6,9 +6,22 @@
 
 When we started, we had a crazy idea.
 Let's replicate CERN and put it in a box.
-And make it open source, hardware and software.
+Accelerator + Detector + Data Analysis
+Open source, both hardware and software.
 
 --------------------------------------------------
+-> # What can we do with it?  <-
+
+Cosmic rays are implicated in our climate system.
+They can cause cloud nucleation.
+Clouds are very important for our climate.
+
+Two important questions: 
+
+1) How many cosmic rays are there right now?
+2) How many cosmic rays were there before we measured them?
+
+-------------------------------------------------
 -> # Muons <-
 ==============
 
@@ -30,7 +43,6 @@ We wanted to use current electronics from CERN detectors.
 4. Raspberry Pi (Digital signal -> Internet)
 
 -------------------------------------------------
-
 -> # An embedded system  <-
 
 Our version 1 was a simple PCB on top of a Raspberry Pi.
@@ -38,7 +50,6 @@ Our version 1 was a simple PCB on top of a Raspberry Pi.
 It didn't work. 
 
 -------------------------------------------------
-
 -> # Challenges  <-
 
 A working SiPM based muon detector needs:
@@ -51,7 +62,6 @@ A working SiPM based muon detector needs:
 * Other sensors (GPS, Accelerometer, Magnetometer, Humidity)
 
 -------------------------------------------------
-
 -> # Timing Resolution  <-
 
 c = 3e8m/s
@@ -62,7 +72,19 @@ This is about what is easily achievable with off the shelf electronic parts.
 Good enough for our application.
 
 -------------------------------------------------
+-> # Design Philosophy: Hardware  <-
 
+Accelerometer   ----
+                    |---- I2C Bus
+Humidity Sensor ---- 
+
+GPS --------------------- UART2
+
+Voltage control --------- SPI
+
+Raspberry Pi ------------ UART1
+
+-------------------------------------------------
 -> # Design Philosophy: IoT  <-
 
 The architecture of the system is critical to success:
@@ -75,7 +97,6 @@ This is a very common architecture.
 Many systems have this type of requirement. 
 
 -------------------------------------------------
-
 -> # An internet telescope  <-
 
 It took us a few years to make working hardware.
@@ -87,20 +108,6 @@ And then to build the infrastructure needed to harvest!
 * Build database + visualisation with InfluxDB and Grafana
 
 -------------------------------------------------
-
--> # What can we do with it?  <-
-
-Cosmic rays are implicated in our climate system.
-They can cause cloud nucleation.
-Clouds are very important for our climate.
-
-Two important questions: 
-
-1) How many cosmic rays are there right now?
-2) How many cosmic rays were there before we measured them?
-
--------------------------------------------------
-
 -> # We are now building up our dataset: <-
 
 * Detector location (Lat/Long)