Add more useful text for FMUv1, FMUv3

FMUv1/README.md

@@ -1,16 +1,18 @@
 # FMUv1 Pixhawk Open Hardware Design
 
-> **Note** This design is end-of-life.
-
 This is the first Pixhawk FMU design, and was intended to be used with various piggyback boards, including an [IO](IOv1) board (the boards were combined into one package for the FMUv2 design).
 
+> **Warning** This design is end-of-life.
+
+<span></span>
+> **Tip** General [Pixhawk project](http://pixhawk.org/) information about open designs, schematics and reference hardware, FMU versions, licensing, and trademarks can be found in the repo [README](../README.md).
 
 ## Design Files
 
-The design is provided in [EAGLE](www.cadsoftusa.com) CAD files (can be viewed with the free version).
-And BOM management is performed using [Bob Starr's BOM-EX plugin](http://www.bobstarr.net/pages/downloads.html).
+The design is provided in [EAGLE](https://www.autodesk.com/products/eagle/overview) CAD files (can be viewed with the free version).
 
-The design consists of schematic files (*.sch) and includes open reference hardware PCB layouts (.brd). 
+It consists of schematic files (*.sch) and includes open reference hardware PCB layouts (.brd). 
+BOM management is performed using [Bob Starr's BOM-EX plugin](http://www.bobstarr.net/pages/downloads.html).
 
 ## Feature Overview
 
@@ -26,8 +28,3 @@ The PX4-FMU (Flight Management Unit).
 - USB, JTAG and Serial interfaces/connections.
 - PPM-SUM RC radio inputs
 - Servo outputs.
-
-
-## Licensing & Trademarks
-
-Information on licensing and trademarks for Pixhawk designs can be found here: [Pixhawk Licensing](../README.md#license)

FMUv2/README.md

@@ -1,15 +1,16 @@
 # FMUv2 Pixhawk Open Hardware Design
 
-FMUv1 & FMUv2 boards
- Pixhawk v1 Hardware
+FMUv2 combines the FMUv1 and I/O designs into a single package.
+The open design provides both schematics and open reference layouts.
+
+> **Tip** General [Pixhawk project](http://pixhawk.org/) information about open designs, schematics and reference hardware, FMU versions, licensing, and trademarks can be found in the repo [README](../README.md).
 
-Design files are EAGLE CAD files (can be viewed with the free version)
-www.cadsoftusa.com/
 
-And BOM management is performed using Bob Starr's BOM-EX plugin:
-http://www.bobstarr.net/pages/downloads.html
+## Design Files
 
+The design is provided in [EAGLE](https://www.autodesk.com/products/eagle/overview) CAD files (can be viewed with the free version).
 
-## Licensing & Trademarks
+It consists of schematic files (*.sch) and includes open reference hardware PCB layouts (.brd). 
+BOM management is performed using [Bob Starr's BOM-EX plugin](http://www.bobstarr.net/pages/downloads.html).
 
-Information on licensing and trademarks for Pixhawk designs can be found here: [Pixhawk Licensing](../README.md#license)
+> **Tip** A PDF version of the schematics and PCB layouts has been made available for easy previewing: [PX4FMUv2.4.5.pdf](PX4FMUv2.4.5.pdf).

FMUv5/README.md

@@ -1,21 +1,22 @@
 # FMUv5 Pixhawk Open Hardware Design
 
+FMUv5 was released in 2018. When compared to previous versions it has a new processor, 2xRAM, new sensors with higher temperature stability, and is much more configurable. 
+More information can be found in the [Pixhawk4 Data Sheet](Pixhawk4-Data-Sheet.pdf).
+
 > **Tip** General [Pixhawk project](http://pixhawk.org/) information about open designs, schematics and reference hardware, FMU versions, licensing, and trademarks can be found in the repo [README](../README.md).
 
-FMUv5 was released in 2018. When compared to previous versions it has a new processor, double the RAM, new sensors with higher temperature stability, and is much more configurable. 
-More information can be found in the [Pixhawk4 Data Sheet](Pixhawk4-Data-Sheet.pdf).
 
 ## Design Files
 
 The FMUv5 reference design pinout is available [on Google docs here](https://docs.google.com/spreadsheets/d/1-n0__BYDedQrc_2NHqBenG1DNepAgnHpSGglke-QQwY/edit#gid=912976165) (linked from [FMUv5_stm32_pinout.md](FMUv5_stm32_pinout.md)).
-This includes everything needed to create compatible hardware (pinouts, bus information).
+This includes everything needed to create compatible hardware.
 
 Note
 - Schematics are not provided.
 - Open reference hardware designs are not provided (Pixhawk 4 is a *proprietary* hardware layout based on this design).
 
 ## Other Files
 
-This design additionally contains Pixhawk 4 information that will be useful if creating compatible products:
+This design additionally contains Pixhawk 4 information that may be useful if creating compatible products:
 - [Pixhawk4 Pinouts](Pixhawk4-Pinouts.pdf)
 - [Pixhawk4 Data Sheet](Pixhawk4-Data-Sheet.pdf)