diff --git a/peak_det_eval.grc b/peak_det_eval.grc
index e729537..d662ad9 100644
--- a/peak_det_eval.grc
+++ b/peak_det_eval.grc
@@ -101,7 +101,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(480, 12)</value>
+      <value>(432, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -128,7 +128,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(376, 12)</value>
+      <value>(320, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -155,7 +155,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(24, 572)</value>
+      <value>(112, 572)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -225,18 +225,26 @@
     </param>
   </block>
   <block>
-    <key>variable</key>
+    <key>variable_qtgui_range</key>
     <param>
       <key>comment</key>
       <value></value>
     </param>
+    <param>
+      <key>value</key>
+      <value>130e6</value>
+    </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(592, 12)</value>
+      <value>(544, 12)</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
     </param>
     <param>
       <key>_rotation</key>
@@ -247,8 +255,36 @@
       <value>f_tune</value>
     </param>
     <param>
-      <key>value</key>
-      <value>130e6</value>
+      <key>label</key>
+      <value>Frequency</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>400</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>80e6</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>samp_rate/2</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>480e6</value>
+    </param>
+    <param>
+      <key>rangeType</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
     </param>
   </block>
   <block>
@@ -290,7 +326,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(264, 12)</value>
+      <value>(208, 12)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -525,6 +561,105 @@
       <value>firdes.WIN_HAMMING</value>
     </param>
   </block>
+  <block>
+    <key>variable_qtgui_chooser</key>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>"RX2"</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(1184, 388)</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>variable_qtgui_antanna</value>
+    </param>
+    <param>
+      <key>label0</key>
+      <value>"RX2"</value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value>"TX / RX"</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value>RX 1</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Antenna</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>[]</value>
+    </param>
+    <param>
+      <key>num_opts</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>option0</key>
+      <value>"RX2"</value>
+    </param>
+    <param>
+      <key>option1</key>
+      <value>"TX/RX"</value>
+    </param>
+    <param>
+      <key>option2</key>
+      <value>"RX1"</value>
+    </param>
+    <param>
+      <key>option3</key>
+      <value>3</value>
+    </param>
+    <param>
+      <key>option4</key>
+      <value>4</value>
+    </param>
+    <param>
+      <key>options</key>
+      <value>[0, 1, 2]</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.QHBoxLayout</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>string</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>radio_buttons</value>
+    </param>
+  </block>
   <block>
     <key>variable_qtgui_check_box</key>
     <param>
@@ -667,7 +802,7 @@
     </param>
     <param>
       <key>max_gain</key>
-      <value>50</value>
+      <value>10</value>
     </param>
     <param>
       <key>maxoutbuf</key>
@@ -2579,6 +2714,53 @@
       <value>0</value>
     </param>
   </block>
+  <block>
+    <key>parameter</key>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(432, 600)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>parameter_0</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value></value>
+    </param>
+    <param>
+      <key>short_id</key>
+      <value></value>
+    </param>
+    <param>
+      <key>hide</key>
+      <value>none</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value></value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+  </block>
   <block>
     <key>qtgui_freq_sink_x</key>
     <param>
@@ -3843,7 +4025,7 @@
     </param>
     <param>
       <key>ant0</key>
-      <value>RX2</value>
+      <value>variable_qtgui_antanna</value>
     </param>
     <param>
       <key>bw0</key>