diff --git a/client/gui/implementations/GuiCraftAmount.java b/client/gui/implementations/GuiCraftAmount.java
index 9043638be..4b432a34a 100644
--- a/client/gui/implementations/GuiCraftAmount.java
+++ b/client/gui/implementations/GuiCraftAmount.java
@@ -3,12 +3,12 @@ package appeng.client.gui.implementations;
 import java.io.IOException;
 
 import net.minecraft.client.gui.GuiButton;
-import net.minecraft.client.gui.GuiTextField;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.item.ItemStack;
 import appeng.api.AEApi;
 import appeng.api.storage.ITerminalHost;
 import appeng.client.gui.AEBaseGui;
+import appeng.client.gui.widgets.GuiNumberBox;
 import appeng.client.gui.widgets.GuiTabButton;
 import appeng.container.AEBaseContainer;
 import appeng.container.implementations.ContainerCraftAmount;
@@ -27,7 +27,7 @@ import appeng.parts.reporting.PartTerminal;
 public class GuiCraftAmount extends AEBaseGui
 {
 
-	GuiTextField amountToCraft;
+	GuiNumberBox amountToCraft;
 	GuiTabButton originalGuiBtn;
 
 	GuiButton next;
@@ -93,7 +93,7 @@ public class GuiCraftAmount extends AEBaseGui
 		if ( OriginalGui != null )
 			buttonList.add( originalGuiBtn = new GuiTabButton( this.guiLeft + 154, this.guiTop, myIcon, myIcon.getDisplayName(), itemRender ) );
 
-		amountToCraft = new GuiTextField( fontRendererObj, this.guiLeft + 62, this.guiTop + 57, 59, fontRendererObj.FONT_HEIGHT );
+		amountToCraft = new GuiNumberBox( fontRendererObj, this.guiLeft + 62, this.guiTop + 57, 59, fontRendererObj.FONT_HEIGHT, Integer.class );
 		amountToCraft.setEnableBackgroundDrawing( false );
 		amountToCraft.setMaxStringLength( 16 );
 		amountToCraft.setTextColor( 0xFFFFFF );
@@ -109,6 +109,7 @@ public class GuiCraftAmount extends AEBaseGui
 
 		try
 		{
+			
 			if ( btn == originalGuiBtn )
 			{
 				NetworkHandler.instance.sendToServer( new PacketSwitchGuis( OriginalGui ) );
@@ -121,6 +122,11 @@ public class GuiCraftAmount extends AEBaseGui
 			}
 
 		}
+		catch(NumberFormatException e )
+		{
+			// nope..
+			amountToCraft.setText( "1" );
+		}
 		catch (IOException e)
 		{
 			AELog.error( e );
@@ -152,7 +158,7 @@ public class GuiCraftAmount extends AEBaseGui
 			if ( Out.length() == 0 )
 				Out = "0";
 
-			long result = Long.parseLong( Out );
+			long result = Integer.parseInt( Out );
 
 			if ( result == 1 && i > 1 )
 				result = 0;
@@ -160,8 +166,10 @@ public class GuiCraftAmount extends AEBaseGui
 			result += i;
 			if ( result < 1 )
 				result = 1;
-
-			amountToCraft.setText( Out = Long.toString( result ) );
+			
+			Out = Long.toString( result );
+			Integer.parseInt( Out );
+			amountToCraft.setText( Out );
 		}
 		catch (NumberFormatException e)
 		{
diff --git a/client/gui/implementations/GuiLevelEmitter.java b/client/gui/implementations/GuiLevelEmitter.java
index c049721c7..d3df40c14 100644
--- a/client/gui/implementations/GuiLevelEmitter.java
+++ b/client/gui/implementations/GuiLevelEmitter.java
@@ -3,7 +3,6 @@ package appeng.client.gui.implementations;
 import java.io.IOException;
 
 import net.minecraft.client.gui.GuiButton;
-import net.minecraft.client.gui.GuiTextField;
 import net.minecraft.entity.player.InventoryPlayer;
 
 import org.lwjgl.input.Mouse;
@@ -14,6 +13,7 @@ import appeng.api.config.RedstoneMode;
 import appeng.api.config.Settings;
 import appeng.api.config.Upgrades;
 import appeng.client.gui.widgets.GuiImgButton;
+import appeng.client.gui.widgets.GuiNumberBox;
 import appeng.container.implementations.ContainerLevelEmitter;
 import appeng.core.AEConfig;
 import appeng.core.AELog;
@@ -26,7 +26,7 @@ import appeng.parts.automation.PartLevelEmitter;
 public class GuiLevelEmitter extends GuiUpgradeable
 {
 
-	GuiTextField level;
+	GuiNumberBox level;
 
 	GuiButton plus1, plus10, plus100, plus1000;
 	GuiButton minus1, minus10, minus100, minus1000;
@@ -42,7 +42,7 @@ public class GuiLevelEmitter extends GuiUpgradeable
 	{
 		super.initGui();
 
-		level = new GuiTextField( fontRendererObj, this.guiLeft + 24, this.guiTop + 43, 79, fontRendererObj.FONT_HEIGHT );
+		level = new GuiNumberBox( fontRendererObj, this.guiLeft + 24, this.guiTop + 43, 79, fontRendererObj.FONT_HEIGHT, Long.class );
 		level.setEnableBackgroundDrawing( false );
 		level.setMaxStringLength( 16 );
 		level.setTextColor( 0xFFFFFF );
@@ -130,6 +130,11 @@ public class GuiLevelEmitter extends GuiUpgradeable
 
 			NetworkHandler.instance.sendToServer( new PacketValueConfig( "LevelEmitter.Value", Out ) );
 		}
+		catch(NumberFormatException e )
+		{
+			// nope..
+			level.setText( "0" );
+		}
 		catch (IOException e)
 		{
 			AELog.error( e );
diff --git a/client/gui/implementations/GuiPriority.java b/client/gui/implementations/GuiPriority.java
index b5f67bbeb..929a03184 100644
--- a/client/gui/implementations/GuiPriority.java
+++ b/client/gui/implementations/GuiPriority.java
@@ -3,11 +3,11 @@ package appeng.client.gui.implementations;
 import java.io.IOException;
 
 import net.minecraft.client.gui.GuiButton;
-import net.minecraft.client.gui.GuiTextField;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.item.ItemStack;
 import appeng.api.AEApi;
 import appeng.client.gui.AEBaseGui;
+import appeng.client.gui.widgets.GuiNumberBox;
 import appeng.client.gui.widgets.GuiTabButton;
 import appeng.container.AEBaseContainer;
 import appeng.container.implementations.ContainerPriority;
@@ -29,7 +29,7 @@ import appeng.tile.storage.TileDrive;
 public class GuiPriority extends AEBaseGui
 {
 
-	GuiTextField priority;
+	GuiNumberBox priority;
 	GuiTabButton originalGuiBtn;
 
 	GuiButton plus1, plus10, plus100, plus1000;
@@ -103,7 +103,7 @@ public class GuiPriority extends AEBaseGui
 		if ( OriginalGui != null )
 			buttonList.add( originalGuiBtn = new GuiTabButton( this.guiLeft + 154, this.guiTop, myIcon, myIcon.getDisplayName(), itemRender ) );
 
-		priority = new GuiTextField( fontRendererObj, this.guiLeft + 62, this.guiTop + 57, 59, fontRendererObj.FONT_HEIGHT );
+		priority = new GuiNumberBox( fontRendererObj, this.guiLeft + 62, this.guiTop + 57, 59, fontRendererObj.FONT_HEIGHT, Long.class );
 		priority.setEnableBackgroundDrawing( false );
 		priority.setMaxStringLength( 16 );
 		priority.setTextColor( 0xFFFFFF );
@@ -162,6 +162,11 @@ public class GuiPriority extends AEBaseGui
 
 			NetworkHandler.instance.sendToServer( new PacketValueConfig( "PriorityHost.Priority", Out ) );
 		}
+		catch(NumberFormatException e )
+		{
+			// nope..
+			priority.setText( "0" );
+		}
 		catch (IOException e)
 		{
 			AELog.error( e );
diff --git a/client/gui/widgets/GuiNumberBox.java b/client/gui/widgets/GuiNumberBox.java
new file mode 100644
index 000000000..dd9ed6dcd
--- /dev/null
+++ b/client/gui/widgets/GuiNumberBox.java
@@ -0,0 +1,39 @@
+package appeng.client.gui.widgets;
+
+import net.minecraft.client.gui.FontRenderer;
+import net.minecraft.client.gui.GuiTextField;
+
+
+public class GuiNumberBox extends GuiTextField
+{
+	
+	final Class type;
+	
+	public GuiNumberBox(FontRenderer p_i1032_1_, int p_i1032_2_, int p_i1032_3_, int p_i1032_4_, int p_i1032_5_,Class type) {
+		super( p_i1032_1_, p_i1032_2_, p_i1032_3_, p_i1032_4_, p_i1032_5_ );
+		this.type = type;
+	}
+
+	@Override
+	public void writeText(String p_146191_1_)
+	{
+		String original = getText();
+		super.writeText( p_146191_1_ );
+		
+		try
+		{
+			if ( type == int.class || type == Integer.class )
+				Integer.parseInt( getText() );
+			else if ( type == long.class || type == Long.class )
+				Long.parseLong( getText() );
+			else if ( type == double.class || type == Double.class )
+				Double.parseDouble( getText() );
+		}
+		catch(NumberFormatException e )
+		{
+			setText( original );
+		}
+	}
+	
+
+}