diff --git a/BizHawk.MultiClient/tools/RamSearch.Designer.cs b/BizHawk.MultiClient/tools/RamSearch.Designer.cs
index c8eeff6eb9..a3df41f1f2 100644
--- a/BizHawk.MultiClient/tools/RamSearch.Designer.cs
+++ b/BizHawk.MultiClient/tools/RamSearch.Designer.cs
@@ -135,7 +135,7 @@
             this.PoketoolStripButton1});
             this.SearchtoolStrip1.Location = new System.Drawing.Point(3, 0);
             this.SearchtoolStrip1.Name = "SearchtoolStrip1";
-            this.SearchtoolStrip1.Size = new System.Drawing.Size(162, 25);
+            this.SearchtoolStrip1.Size = new System.Drawing.Size(131, 25);
             this.SearchtoolStrip1.TabIndex = 0;
             this.SearchtoolStrip1.Text = "Search";
             // 
@@ -845,6 +845,7 @@
             this.NotEqualToRadio.TabIndex = 5;
             this.NotEqualToRadio.Text = "Not Equal To";
             this.NotEqualToRadio.UseVisualStyleBackColor = true;
+            this.NotEqualToRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // EqualToRadio
             // 
@@ -855,6 +856,7 @@
             this.EqualToRadio.TabIndex = 4;
             this.EqualToRadio.Text = "Equal To";
             this.EqualToRadio.UseVisualStyleBackColor = true;
+            this.EqualToRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // GreaterThanOrEqualToRadio
             // 
@@ -865,6 +867,7 @@
             this.GreaterThanOrEqualToRadio.TabIndex = 3;
             this.GreaterThanOrEqualToRadio.Text = "Greater Than or Equal To";
             this.GreaterThanOrEqualToRadio.UseVisualStyleBackColor = true;
+            this.GreaterThanOrEqualToRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // LessThanOrEqualToRadio
             // 
@@ -875,6 +878,7 @@
             this.LessThanOrEqualToRadio.TabIndex = 2;
             this.LessThanOrEqualToRadio.Text = "Less Than or Equal To";
             this.LessThanOrEqualToRadio.UseVisualStyleBackColor = true;
+            this.LessThanOrEqualToRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // GreaterThanRadio
             // 
@@ -885,6 +889,7 @@
             this.GreaterThanRadio.TabIndex = 1;
             this.GreaterThanRadio.Text = "Greater Than";
             this.GreaterThanRadio.UseVisualStyleBackColor = true;
+            this.GreaterThanRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // LessThanRadio
             // 
@@ -897,6 +902,7 @@
             this.LessThanRadio.TabStop = true;
             this.LessThanRadio.Text = "Less Than";
             this.LessThanRadio.UseVisualStyleBackColor = true;
+            this.LessThanRadio.CheckedChanged += new System.EventHandler(this.LessThanRadio_CheckedChanged);
             // 
             // AutoSearchCheckBox
             // 
diff --git a/BizHawk.MultiClient/tools/RamSearch.cs b/BizHawk.MultiClient/tools/RamSearch.cs
index ae170c3d77..b02e7f4bcf 100644
--- a/BizHawk.MultiClient/tools/RamSearch.cs
+++ b/BizHawk.MultiClient/tools/RamSearch.cs
@@ -18,7 +18,9 @@ namespace BizHawk.MultiClient
     {
         //TODO:
         //Window position gets saved but doesn't load properly
-        //Implement Preview search
+        //Implement Preview search each frame (perhaps if autosearch is not on?)
+            //Refactor preview search to use prevList
+        //Add Preview toggle to options menu
         //Implement definitions of Previous value
         //Multiple memory domains
         //Option to remove current Ram Watch list from search list
@@ -135,6 +137,7 @@ namespace BizHawk.MultiClient
         {
             if (SpecificValueRadio.Checked)
             {
+                if (SpecificValueBox.Text == "") SpecificValueBox.Text = "0";
                 SpecificValueBox.Enabled = true;
                 SpecificAddressBox.Enabled = false;
                 NumberOfChangesBox.Enabled = false;
@@ -157,6 +160,7 @@ namespace BizHawk.MultiClient
         {
             if (SpecificAddressRadio.Checked)
             {
+                if (SpecificAddressBox.Text == "") SpecificAddressBox.Text = "0";
                 SpecificValueBox.Enabled = false;
                 SpecificAddressBox.Enabled = true;
                 NumberOfChangesBox.Enabled = false;
@@ -169,6 +173,7 @@ namespace BizHawk.MultiClient
         {
             if (NumberOfChangesRadio.Checked)
             {
+                if (NumberOfChangesBox.Text == "") NumberOfChangesBox.Text = "0";
                 SpecificValueBox.Enabled = false;
                 SpecificAddressBox.Enabled = false;
                 NumberOfChangesBox.Enabled = true;
@@ -180,7 +185,11 @@ namespace BizHawk.MultiClient
         private void DifferentByRadio_CheckedChanged(object sender, EventArgs e)
         {
             if (DifferentByRadio.Checked)
+            {
+                if (DifferentByBox.Text == "0") DifferentByBox.Text = "0";
                 DifferentByBox.Enabled = true;
+                DoPreview();
+            }
             else
                 DifferentByBox.Enabled = false;
             DifferentByBox.Focus();
@@ -505,6 +514,7 @@ namespace BizHawk.MultiClient
 
         private void DoPreview()
         {
+            weededList.Clear();     //TODO: use previewList to avoid having to clear this!
             if (GenerateWeedOutList())
             {
                 DisplaySearchList();
@@ -717,6 +727,7 @@ namespace BizHawk.MultiClient
 
         private int GetSpecificValue()
         {
+            if (SpecificValueBox.Text == "") return 0;
             bool i = InputValidate.IsValidSignedNumber(SpecificValueBox.Text);
             if (!i) return -1;
 
@@ -725,6 +736,7 @@ namespace BizHawk.MultiClient
 
         private int GetSpecificAddress()
         {
+            if (SpecificAddressBox.Text == "") return 0;
             bool i = InputValidate.IsValidHexNumber(SpecificAddressBox.Text);
             if (!i) return -1;
 
@@ -733,6 +745,7 @@ namespace BizHawk.MultiClient
 
         private int GetDifferentBy()
         {
+            if (DifferentByBox.Text == "") return 0;
             bool i = InputValidate.IsValidUnsignedNumber(DifferentByBox.Text);
             if (!i)
             {
@@ -816,6 +829,7 @@ namespace BizHawk.MultiClient
 
         private int GetSpecificChanges()
         {
+            if (NumberOfChangesBox.Text == "") return 0;
             bool i = InputValidate.IsValidUnsignedNumber(NumberOfChangesBox.Text);
             if (!i) return -1;
 
@@ -1357,6 +1371,11 @@ namespace BizHawk.MultiClient
                     break;
             }
         }
+
+        private void LessThanRadio_CheckedChanged(object sender, EventArgs e)
+        {
+            if (!DifferentByRadio.Checked) DoPreview();
+        }
     }