diff --git a/model/composite/particle_free.xml b/model/composite/particle_free.xml
index d5b72ffb..681c5062 100644
--- a/model/composite/particle_free.xml
+++ b/model/composite/particle_free.xml
@@ -18,7 +18,7 @@
 
   <option solver="CG" tolerance="1e-6" timestep=".01"/>
 
-  <size nconmax="6000" njmax="6000" nstack="50000000"/>
+  <size memory="5M"/>
 
   <visual>
     <map stiffness="100"/>
diff --git a/model/composite/particle_free2d.xml b/model/composite/particle_free2d.xml
index c7b79152..624bc8e0 100644
--- a/model/composite/particle_free2d.xml
+++ b/model/composite/particle_free2d.xml
@@ -18,7 +18,7 @@
 
   <option solver="CG" tolerance="1e-6" timestep=".01"/>
 
-  <size nconmax="6000" njmax="6000" nstack="50000000"/>
+  <size memory="10M"/>
 
   <visual>
     <map stiffness="100"/>
diff --git a/model/plugin/floppy.xml b/model/plugin/floppy.xml
index 76611538..748b19a9 100644
--- a/model/plugin/floppy.xml
+++ b/model/plugin/floppy.xml
@@ -24,7 +24,7 @@
 
   <option solver="Newton" tolerance="1e-6" timestep=".001"/>
 
-  <size nconmax="6000" njmax="6000" nstack="50000000"/>
+  <size memory="100M"/>
 
   <visual>
     <map stiffness="100"/>
diff --git a/model/plugin/jelly.xml b/model/plugin/jelly.xml
index 279b6f94..be583020 100644
--- a/model/plugin/jelly.xml
+++ b/model/plugin/jelly.xml
@@ -22,7 +22,7 @@
 
   <option solver="CG" tolerance="1e-6" timestep=".001"/>
 
-  <size nconmax="6000" njmax="6000" nstack="50000000"/>
+  <size memory="10M"/>
 
   <visual>
     <map stiffness="100"/>
diff --git a/model/plugin/press.xml b/model/plugin/press.xml
index 5b0e9408..b55bf40b 100644
--- a/model/plugin/press.xml
+++ b/model/plugin/press.xml
@@ -24,7 +24,7 @@
 
   <option solver="Newton" tolerance="1e-6" timestep=".001"/>
 
-  <size nconmax="6000" njmax="6000" nstack="50000000"/>
+  <size memory="10M"/>
 
   <visual>
     <map stiffness="100"/>