diff --git a/README.md b/README.md
index c55e867..3b24e42 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,23 @@ Option 2 - Switch a board to BOOTSEL mode by using a special key combination (li
 
 This will make the corresponding Pico board enter the bootloader upgrade mode and act as USB flash drive. Now you can drag-and-drop the .uf2 file to it (you might need to plug in your mouse directly).
 
+## Security and Safety
+
+Some features are missing on purpose, despite the fact it would make the device easier to use or simpler to configure. Here is a quick breakdown of these decisions:
+
+- There is no copy-paste or *any* information sharing between systems. This prevents information leakage.
+- No webhid device management or any inbound connectivity from the output computers, with the only exception of standard keyboard LED on/off messages, hard limited to 1 byte of data.
+- No FW upgrade triggering from the outputs. Only explicit and deliberate user action through a special keyboard shortcut may do that.
+- No plugged-in keyboard/mouse custom endpoints are exposed or information forwarded towards these devices. Their potential vulnerabilities are effectively firewalled from the computer.
+- No input history is allowed to be retained.
+- Outputs are physically separated and galvanically isolated with a minimal isolation voltage of 2kV.
+- All packets exchanged between devices are of fixed length, no code is transferred and no raw config exchange of any kind can take place.
+- There is no bluetooth or wifi, networking, Internet access, usb drives etc.
+- No connected computer is considered trusted under any circumstances.
+- Entirety of the code is open source, without any binary blobs and thoroughly commented to explain its purpose. I encourage you to never trust anyone and always make sure you know what you are running by doing a manual audit.
+
+This still doesn't guarantee anything, but I believe it makes a reasonable set of ground rules to keep you safe and protected.
+
 ## Misc features
 
 ### Mouse slowdown
@@ -117,6 +134,8 @@ Planned changes:
 - Add indications on the silkscreen for pin1 on the ADuM1201
 - Add indications on the silkscreen for which Raspberry Pi Pico pins need to be soldered
 
+... done, waiting on PCBs to re-test and verify everything. Stay tuned for an updated version!
+
 ## Case
 
 Since I'm not very good with 3d, the case is [simple and basic](case/) but does the job. It should be easy to print, uses ~33g of filament and takes a couple of hours.
@@ -142,6 +161,7 @@ The lid is of a snap-fit design, with a screwdriver slot for opening. The markin
 |                    |     |          Total | 11.53    |
 
 USB-A connector can be Molex MX-67643-0910 or a cheaper/budget one that shares the same dimensions.
+TI ISO7721DR can be used instead of the ADuM - it's pin-compatible, much cheaper and with better specs.
 
 Additional steps:
 
@@ -263,6 +283,8 @@ Planned features:
 - Unified firmware for both Picos
 - ... and more!
 
+Working on a *lite* version which provides basic functionality with just a single Pico W board, lowering the cost even further and enabling you to try it out even with no added hardware or PCB.
+
 Mouse polling should now work at 1000 Hz (the dips in the graph is my arm hurting from all the movement :-)):
 
 ![Mouse polling rate](img/polling_rate.png)