diff --git a/resources/patches-deobfuscated.xml b/resources/patches-deobfuscated.xml
index 4bf855f9..284662be 100644
--- a/resources/patches-deobfuscated.xml
+++ b/resources/patches-deobfuscated.xml
@@ -1531,63 +1531,69 @@
 						}
 
 						List sList = new SynchronizedList();
-						synchronized(sList) {
-							List newList = inv.getAvailableItems(sList);
-							if (newList != sList) {
-								sList.addAll(newList);
-								newList = sList;
-							}
-							if (newList == null) {
-								newList = new SynchronizedList();
-							}
-							if (this.oldList == null) {
-								this.oldList = new SynchronizedList();
-							}
-							oList = this.oldList;
-							this.oldList = newList;
-							ArrayList toAdd = new ArrayList();
-
-							synchronized(oList) {
-								if (oList.size() != newList.size()) {
-									gi.onInventoryChange();
+						Object o = getGrid();
+						if (o == null) {
+							o = new Object();
+						}
+						synchronized (o) {
+							synchronized (sList) {
+								List newList = inv.getAvailableItems(sList);
+								if (newList != sList) {
+									sList.addAll(newList);
+									newList = sList;
+								}
+								if (newList == null) {
+									newList = new SynchronizedList();
+								}
+								if (this.oldList == null) {
+									this.oldList = new SynchronizedList();
 								}
+								oList = this.oldList;
+								this.oldList = newList;
+								ArrayList toAdd = new ArrayList();
 
-								for (Iterator i1 = newList.iterator(); i1.hasNext();) {
-									ur x = (ur) i1.next();
-									boolean found = false;
-									for (Iterator i2 = oList.iterator(); i2.hasNext();) {
-										ur y = (ur) i2.next();
-										if (appeng.util.Platform.isSameItem(x, y))
-										{
-											found = true;
+								synchronized(oList) {
+									if (oList.size() != newList.size()) {
+										gi.onInventoryChange();
+									}
 
-											if (x.a != y.a)
+									for (Iterator i1 = newList.iterator(); i1.hasNext();) {
+										ur x = (ur) i1.next();
+										boolean found = false;
+										for (Iterator i2 = oList.iterator(); i2.hasNext();) {
+											ur y = (ur) i2.next();
+											if (appeng.util.Platform.isSameItem(x, y))
 											{
-												this.freq = 0;
-												if (x.a <= y.a)
+												found = true;
+
+												if (x.a != y.a)
+												{
+													this.freq = 0;
+													if (x.a <= y.a)
+														break;
+													ur j = x.l();
+													j.a -= y.a;
+													toAdd.add(j);
 													break;
-												ur j = x.l();
-												j.a -= y.a;
-												toAdd.add(j);
-												break;
+												}
+
 											}
 
 										}
 
-									}
-
-									if (!found)
-									{
-										this.freq = 0;
-										toAdd.add(x);
+										if (!found)
+										{
+											this.freq = 0;
+											toAdd.add(x);
+										}
 									}
 								}
-							}
-							if (!toAdd.isEmpty()) {
-								gi.onInventoryChange();
-								Iterator iterator = toAdd.iterator();
-								while (iterator.hasNext()) {
-									gi.signalInput(null, (ur) iterator.next());
+								if (!toAdd.isEmpty()) {
+									gi.onInventoryChange();
+									Iterator iterator = toAdd.iterator();
+									while (iterator.hasNext()) {
+										gi.signalInput(null, (ur) iterator.next());
+									}
 								}
 							}
 						}