diff --git a/index.html b/index.html
index 9ffb344..6549f86 100644
--- a/index.html
+++ b/index.html
@@ -46,6 +46,10 @@
               <td>Verbose Logging:</td>
               <td colspan="2"><input type="checkbox" id="bpc-trace"/></td>
             </tr>
+            <tr>
+              <td>Experimental Timing:</td>
+              <td colspan="2"><input type="checkbox" id="exp-timing"/></td>
+            </tr>
             <tr>
               <td colspan="3"><div id="log" class="con"></div></td>
             </tr>
diff --git a/index.js b/index.js
index 91cb965..fc3cca1 100644
--- a/index.js
+++ b/index.js
@@ -104,6 +104,8 @@ var portLister = [];
 // Is verbose loggin turned on?
 var verboseLogging = false;
 
+// Is experimental timing turned on?
+var experimentalTiming = false;
 
 document.addEventListener('DOMContentLoaded', function() {
 
@@ -182,7 +184,11 @@ document.addEventListener('DOMContentLoaded', function() {
   $('bpc-trace').onclick = function() {
     verboseLogging = $('bpc-trace').checked;
   };
-  
+
+  $('exp-timing').onclick = function() {
+      experimentalTiming = $('exp-timing').checked;
+  };
+
   $('wx-allow').onclick = function() {
     var wx_enabled = $('wx-allow').checked;
     if(wx_enabled) {
diff --git a/loader.js b/loader.js
index d2330eb..a21006f 100644
--- a/loader.js
+++ b/loader.js
@@ -138,16 +138,12 @@ function loadPropeller(sock, portPath, action, payload, debug) {
 
         if (port.isWired) {
             //Set postResetDelay based on platform; ideal Post-Reset Delay = 100 ms; adjust downward according to typically-busy operating systems
-            postResetDelay = (platform === pfWin) ? 60 : 100;
+            postResetDelay = ((platform === pfWin) && (!experimentalTiming)) ? 60 : 100;
             if (port.connId) {
-                // Connection exists, prep to close it first (to reset it), then open it (fresh)
-                originalBaudrate = initialBaudrate;
-                connect = function() {return closePort(port).then(function() {return openPort(sock, portPath, initialBaudrate, "programming")}).catch(function(e) {return Promise.reject(e)})}
-//                The following temporarily removed (and replaced above) to intentionally close and reopen port in hopes it eliminates the CrOS v67+ failed download problem
-//                // Connection exists, prep to reuse it
-//                originalBaudrate = port.baud;
-//                updatePort(port, {mode: "programming", bSocket: sock});
-//                connect = function() {return changeBaudrate(port, initialBaudrate)}
+                // Connection exists, prep to reuse it
+                originalBaudrate = port.baud;
+                updatePort(port, {mode: "programming", bSocket: sock});
+                connect = function() {return changeBaudrate(port, initialBaudrate)}
             } else {
                 // No connection yet, prep to create one
                 originalBaudrate = initialBaudrate;
@@ -261,6 +257,14 @@ function clearPropCommTimer() {
     }
 }
 
+function wait(ms) {
+    /* Actively delay for ms milliseconds.
+    This should only be used for time-critical delays as it doesn't release to the task queue but instead consumes CPU time until finished.
+    */
+    let Done = Date.now() + ms;
+    while (Date.now() < Done){}
+}
+
 function talkToProp(sock, port, binImage, toEEPROM) {
     /* Return promise to deliver Propeller Application (binImage) to Propeller
      sock is the websocket to direct mUser messages at
@@ -283,7 +287,8 @@ function talkToProp(sock, port, binImage, toEEPROM) {
 
                 function sendMBL() {
                     return new Promise(function(resolve, reject) {
-                        setTimeout(function() {
+
+                        function txmit() {
                             //Prep for expected packetID:transmissionId response (Micro-Boot-Loader's "Ready" signal)
                             propComm.mblEPacketId[0] = packetId;
                             propComm.mblETransId[0] = 0;                                                     //MBL transmission's Id is always 0
@@ -295,9 +300,16 @@ function talkToProp(sock, port, binImage, toEEPROM) {
                                 .then(function() {log(notice(000, ["Found Propeller"]), mUser+mDbug, sock)}) //Succeeded!
                                 .then(function() {return resolve()})
                                 .catch(function(e) {return reject(e)});                                      //Failed!
-                        }, postResetDelay);
+                        }
+
+                        if (!experimentalTiming) {
+                            setTimeout(txmit, postResetDelay);
+                        } else {
+                            wait(postResetDelay);
+                            txmit();
+                        }
                     });
-                };
+                }
 
                 Promise.resolve()
                     .then(function() {                   resetPropComm(port, mblDeliveryTime, null, null, true);})        //Reset propComm object
diff --git a/manifest.json b/manifest.json
index b433faf..805681f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "name": "BlocklyProp Launcher",
   "description": "A Chrome application that connects your Propeller-Powered Hardware to the BlocklyProp website.",
-  "version": "0.9.4",
+  "version": "0.9.5",
   "manifest_version": 2,
   "minimum_chrome_version": "45",
   
diff --git a/serial.js b/serial.js
index c801eca..432c079 100644
--- a/serial.js
+++ b/serial.js
@@ -140,7 +140,7 @@ function closePort(port, command) {
                             log("Closed port " + port.path + " (id " + port.connId + ")", mDbug);
                             // Clear connection id to indicate port is closed
                             updatePort(port, {connId: null});
-                            setTimeout(resolve, 250);  //Delay resolve() to prevent future openPort() calls from arriving too soon to accommodate
+                            resolve();
                         } else {
                             log("Could not close port " + port.path + " (id " + port.connId + ")", mDbug);
                             reject(Error(notice(neCanNotClosePort, [port.path])));