diff --git a/src/equipment/cnc_mill/README.md b/src/equipment/cnc_mill/README.md
index 75c5ce1..26b88eb 100644
--- a/src/equipment/cnc_mill/README.md
+++ b/src/equipment/cnc_mill/README.md
@@ -2,9 +2,23 @@
 
 The CNC mill is a RF30 clone round-column mill that has been converted from an Imperial manual mill to a CNC ballscrew conversion.
 
+CNC hardware:
+
+* PC (mill PC) running Ubuntu and gSender
+* PicoCNC board running GRBL-Hal running on a RP2040
+* 48V stepper drivers driving the 3 axis stepper motors
+
 It's a bit rough and ready in a few ways, and final commissioning is still in progress.
 
-It is operated from the Mill PC using the gSender software.
+A few things to be aware of:
+ 
+ * Doesn't have limit switches
+ * Doesn't have home switches
+ * Spindle start is under manual control, not automatic
+ * Needs better e-Stop hardware
+
+The axes are reasonably well calibrated now, but please do offer feedback if you notice any errors.
+
 More details to follow on final commissioning
 
 gSender settings backup [here](./files/gSender-settings.json)