diff --git a/active-crust/fault/wus-system/README.md b/active-crust/fault/wus-system/README.md
index 3be691c6b6527d83d40b00afabe7b71193f67793..a51d55637ec3f97e197b8fd6fffbb15ce593dfdd 100644
--- a/active-crust/fault/wus-system/README.md
+++ b/active-crust/fault/wus-system/README.md
@@ -1,8 +1,4 @@
 # Western U.S. Fault System
 
 This directory contains the currently in-development fault system solution that spans
-the entire Western U.S. (OpenSHA UCERF3 inversion methodology)
-
-## Notes
-
-* The Cheraw fault should be removed from the fault section database used for the WUS
+the entire Western U.S. (OpenSHA UCERF3 inversion methodology).
diff --git a/stable-crust/grid/ceus-stable/sscn/gk/source-tree.json b/stable-crust/grid/ceus-stable/sscn/gk/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/sscn/gk/source-tree.json
+++ b/stable-crust/grid/ceus-stable/sscn/gk/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/ceus-stable/sscn/nn/source-tree.json b/stable-crust/grid/ceus-stable/sscn/nn/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/sscn/nn/source-tree.json
+++ b/stable-crust/grid/ceus-stable/sscn/nn/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/ceus-stable/sscn/r85/source-tree.json b/stable-crust/grid/ceus-stable/sscn/r85/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/sscn/r85/source-tree.json
+++ b/stable-crust/grid/ceus-stable/sscn/r85/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/ceus-stable/usgs/gk/source-tree.json b/stable-crust/grid/ceus-stable/usgs/gk/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/usgs/gk/source-tree.json
+++ b/stable-crust/grid/ceus-stable/usgs/gk/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/ceus-stable/usgs/nn/source-tree.json b/stable-crust/grid/ceus-stable/usgs/nn/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/usgs/nn/source-tree.json
+++ b/stable-crust/grid/ceus-stable/usgs/nn/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/ceus-stable/usgs/r85/source-tree.json b/stable-crust/grid/ceus-stable/usgs/r85/source-tree.json
index 8dbffe3f12419f6ad5266f0b2f359edd5fd628e1..91a8467d54be6cebae34dbc49f73342107e31397 100644
--- a/stable-crust/grid/ceus-stable/usgs/r85/source-tree.json
+++ b/stable-crust/grid/ceus-stable/usgs/r85/source-tree.json
@@ -1,10 +1,10 @@
 [
   {
     "id": "fixed",
-    "weight": 0.4
+    "weight": 0.6
   },
   {
     "id": "adaptive",
-    "weight": 0.6
+    "weight": 0.4
   }
 ]
diff --git a/stable-crust/grid/system-stable/gmm-config.json b/stable-crust/grid/system-stable/gmm-config.json
new file mode 100644
index 0000000000000000000000000000000000000000..307d377683b14eb6f53199cc487ecabe7caa0ad4
--- /dev/null
+++ b/stable-crust/grid/system-stable/gmm-config.json
@@ -0,0 +1,3 @@
+{
+  "max-distance": 300.0
+}
diff --git a/stable-crust/grid/system-stable/gmm-tree.json b/stable-crust/grid/system-stable/gmm-tree.json
new file mode 100644
index 0000000000000000000000000000000000000000..0ea6d359dda0865c86bdcb6c61db7bbf869c6d95
--- /dev/null
+++ b/stable-crust/grid/system-stable/gmm-tree.json
@@ -0,0 +1,10 @@
+[
+  { "id": "NGA_EAST_2023", "weight": 0.16665 },
+  { "id": "NGA_EAST_2023_ADJUSTED", "weight": 0.16665 },
+  { "id": "NGA_EAST_SEEDS_2023", "weight": 0.08335 },
+  { "id": "NGA_EAST_SEEDS_2023_ADJUSTED", "weight": 0.08335 },
+  { "id": "ASK_14_BASIN", "weight": 0.125 },
+  { "id": "BSSA_14_BASIN", "weight": 0.125 },
+  { "id": "CB_14_BASIN", "weight": 0.125 },
+  { "id": "CY_14_BASIN", "weight": 0.125 }  
+]