diff --git a/README.md b/README.md
index 51f60ae..3f669f9 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,9 @@ sucks
 =====
 
 A simple command-line python script to drive a robot vacuum. Currently
-works only with the Ecovacs Deebot N79, as that's what I have.
-
-This only covers my simple use case. There's a lot more it could do.
-If you'd like to help flesh it out, send email to my first name at
-williampietri.com.
+known to work with the Ecovacs Deebot N79, M81, and M88 Pro from North
+America and Europe. Does it work for your model as well? Join the
+discussion on the [sucks-users mailing list](https://groups.google.com/forum/#!forum/sucks-users).
 
 If you're curious about the protocol, I have [a rough doc](protocol.md)
 started. I'll happily accept pull requests for it.
@@ -18,9 +16,8 @@ it's a vacuum.
 
 ## Installation
 
-My belief, so far untested, is that you just check out this code,
-do `pipenv install`, and then call the script `sucks`. If you try,
-please let me know how it turns out.
+Check out this code, do `pipenv install`, and then call the script
+`sucks`. If that doesn't work for you, please [open an issue](https://github.com/wpietri/sucks/issues).
 
 ## Usage
 
@@ -33,6 +30,8 @@ Step one is to log in:
     % sucks login
     Ecovacs app email: [your email]
     Ecovacs app password: [your password]
+    your two-letter country code: us
+    your two-letter contienent code: na
     Config saved.
 ```
 
diff --git a/protocol.md b/protocol.md
index f6b4e2a..3d52139 100644
--- a/protocol.md
+++ b/protocol.md
@@ -7,6 +7,15 @@ all its free time hanging out in an internet chat room.
 This is all taken from MITMing the Android app. The protocol is quirky
 enough that I wouldn't be shocked if the iPhone app does it differently.
 
+## Location
+
+It appears that Ecovacs have broken up their API servers by location. Some
+are designated by country, others by continent. All appear to use the
+two-letter ISO codes, but at this time it doesn't look like all codes
+map to valid servers. If you're in, say, Australia and are trying to
+get this to work, I'd love a packet capture of DNS requests to see what
+the app does there.
+
 ## HTTPS
 
 There are two sorts of URLs in the basic login flow. The first set use
@@ -54,13 +63,13 @@ examples with the private information removed:
 
 A clean command:
 ```
-<iq id="TXID" to="ROBOTID@126.ecorobot.net/atom" from="USERID@ecouser.net/RESOURCEID" type="set"><query xmlns="com:ctl"><ctl td="Clean"><clean type="auto" speed="standard"/></ctl></query></iq>
+<iq id="TXID" to="ROBOTID@MODELID.ecorobot.net/atom" from="USERID@ecouser.net/RESOURCEID" type="set"><query xmlns="com:ctl"><ctl td="Clean"><clean type="auto" speed="standard"/></ctl></query></iq>
 
 ```
 
 A charge command:
 ```
-<iq id="TXID" to="ROBOTID@126.ecorobot.net/atom" from="USERID@ecouser.net/RESOURCEID" type="set"><query xmlns="com:ctl"><ctl td="Charge"><charge type="go"/></ctl></query></iq>
+<iq id="TXID" to="ROBOTID@MODELID.ecorobot.net/atom" from="USERID@ecouser.net/RESOURCEID" type="set"><query xmlns="com:ctl"><ctl td="Charge"><charge type="go"/></ctl></query></iq>
 ```
 
 Focusing on the core ctl elements, this is a sampling of commands seen on the wire after punching all the app buttons: