diff --git a/latest/CAD/README.md b/latest/CAD/README.md
index dd08f0f..cf7850d 100644
--- a/latest/CAD/README.md
+++ b/latest/CAD/README.md
@@ -5,12 +5,16 @@ This directory contains Eagle CAD files as well as schematic PDFs and Gerber exp
 The board stackup is good enough for either OSH Park 4-layer, or JLCPCB 4-layer with controlled impedance (JLC2313). 
 
 ### Latest Board
+Revision 10.0.1 is latest. It adds a few safety features such as ESD protection and isolation between the board's MCU pins and the outside world.
+An appropriate breakout board for series 10.x is included. The "TX OFF" signal is now buffered by a MOSFET on the transponder board and the
+logic is inverted.
 
-Revision 9.3.0 is latest. I built it at JLCPCB with the exact gerber files I posted here. It is fully functional and performed as expected.
+The LED "status" signals are now current-limited open drain outputs via N-Channel MOSFETs on the transponder board. This means they could work
+with any voltage up to 16V without risk of damage to the MCU.
 
-The 9.3 directory also contains a reference design for a breakout to help with development and debugging. The breakout
-features a CH330N USB-to-UART adapter IC as well as a TX "on/off" switch so you can get some ideas about how to interface to the
-unit from your own system. The Gerbers for the breakout are here as well.
+### Older Boards
+Revision 9.3.0 is not bad. I built it at JLCPCB with the exact gerber files I posted here. It is fully functional and performed as expected,
+with some caveats (no ESD protection, no reverse polarity protection)
 
 The 9.3 board adds 3 "status" signals that can drive LEDs (with appropriate current limiting resistors!). These are optional.