Cleaning up multi-master section

Scaling.wiki

diff --git a/Scaling.wiki b/Scaling.wiki
index bd0fc8c..d1502a0 100644
--- a/Scaling.wiki
+++ b/Scaling.wiki
@@ -11,7 +11,7 @@
 
 = Mirrors/Slaves =
 
-Once you have a decent master, it is probably worth adding either some git mirrors (if you do not need ACLs on your repos), or Gerrit slaves to help offload much of your read only requests.  Mirrors/Slaves can also help reduce LAN and WAN traffic if you place them nearer your users/build hosts.  Some of the larger installations have at least 7 of these.
+Once you have a decent master, it is probably worth adding either some git mirrors (if you do not need ACLs on your repos), or Gerrit slaves to help offload much of your read only requests.  Mirrors/Slaves can also help reduce LAN and WAN traffic if you place them nearer your users/build hosts.  Some of the larger installations have at least 20 of these.
 
 == DB Slaves ==
 
@@ -19,7 +19,7 @@
 
 = Multi - Master =
 
-Gerrit cannot yet be run in multi master mode, at least not the open source version.  The gerrit-review site does currently run in multi master mode, but it does not use the same code base as the open source version.  This however means that we are mostly aware of what it will take to make Gerrit support MultiMaster.  Any contributions in this direction should help make this a reality more quickly.
+The Gerrit MultiMaster plugin describes how to setup a single site multi-master with a shared repo backend, but there are no known sites using the opens source MM technology yet.  The google hosted gerrit-review site currently runs in multi-site multi-master mode, but it relies on proprietary technology to do so.
 
 = Issues =