diff --git a/src/natcap/invest/ui_server.py b/src/natcap/invest/ui_server.py
index b73191c08..cf8370ac2 100644
--- a/src/natcap/invest/ui_server.py
+++ b/src/natcap/invest/ui_server.py
@@ -157,7 +157,8 @@ def get_args_enabled():
 def post_datastack_file():
     """Extracts InVEST model args from json, logfiles, or datastacks.
 
-    Body (JSON string): path to file
+    Body (JSON string): 
+        filepath: string, path to file
 
     Returns:
         A JSON string.
diff --git a/workbench/src/main/setupJupyter.js b/workbench/src/main/setupJupyter.js
index 8070cb359..5398e8b79 100644
--- a/workbench/src/main/setupJupyter.js
+++ b/workbench/src/main/setupJupyter.js
@@ -19,8 +19,8 @@ function createWindow(parentWindow, isDevMode) {
   const devModeArg = isDevMode ? '--devMode' : '';
   const win = new BrowserWindow({
     parent: parentWindow,
-    width: 700,
-    height: 800,
+    width: 1200,
+    height: 900,
     frame: true,
     webPreferences: {
       minimumFontSize: 12,
diff --git a/workbench/src/renderer/components/SetupTab/index.jsx b/workbench/src/renderer/components/SetupTab/index.jsx
index a68149c14..b4ea10f93 100644
--- a/workbench/src/renderer/components/SetupTab/index.jsx
+++ b/workbench/src/renderer/components/SetupTab/index.jsx
@@ -228,11 +228,13 @@ class SetupTab extends React.Component {
   async saveDatastack(datastackPath) {
     const {
       pyModuleName,
+      modelId,
     } = this.props;
     const args = argsDictFromObject(this.state.argsValues);
     const payload = {
       filepath: datastackPath,
       moduleName: pyModuleName,
+      modelId: modelId,
       args: JSON.stringify(args),
     };
     const key = window.crypto.getRandomValues(new Uint16Array(1))[0].toString();
@@ -282,7 +284,7 @@ class SetupTab extends React.Component {
   }
 
   async loadParametersFromFile(filepath) {
-    const { pyModuleName, switchTabs, t } = this.props;
+    const { pyModuleName, modelId, switchTabs, t } = this.props;
     let datastack;
     try {
       if (filepath.endsWith('gz')) {  // .tar.gz, .tgz
@@ -292,13 +294,16 @@ class SetupTab extends React.Component {
         );
         if (extractLocation.filePath) {
           datastack = await fetchDatastackFromFile({
+            modelId: modelId,
             filepath: filepath,
             extractPath: extractLocation.filePath});
         } else {
           return;
         }
       } else {
-          datastack = await fetchDatastackFromFile({ filepath: filepath });
+          datastack = await fetchDatastackFromFile({
+            modelId: modelId,
+            filepath: filepath });
       }
     } catch (error) {
       logger.error(error);
diff --git a/workbench/src/renderer/server_requests.js b/workbench/src/renderer/server_requests.js
index 61e6e3f06..fcc811abc 100644
--- a/workbench/src/renderer/server_requests.js
+++ b/workbench/src/renderer/server_requests.js
@@ -120,6 +120,7 @@ export async function fetchArgsEnabled(payload) {
  *
  * @param {object} payload {
  *   model_module: string (e.g. natcap.invest.carbon)
+ *   modelId: string (e.g. carbon)
  *   args: JSON string of InVEST model args keys and values
  * }
  * @returns {Promise} resolves array
@@ -146,11 +147,14 @@ export async function fetchValidation(payload) {
 /**
  * Load invest arguments from a datastack-compliant file.
  *
- * @param {string} payload - path to file
+ * @param  {object} payload {
+ *   filepath: string, path to file
+ *   modelId: string (e.g. carbon)
+ * }
  * @returns {Promise} resolves undefined
  */
 export async function fetchDatastackFromFile(payload) {
-  const port = await getCorePort();
+  const port = await getPort(payload.modelId);
   return (
     window.fetch(`${HOSTNAME}:${port}/${PREFIX}/post_datastack_file`, {
       method: 'post',
@@ -172,7 +176,7 @@ export async function fetchDatastackFromFile(payload) {
  * @returns {Promise} resolves undefined
  */
 export async function saveToPython(payload) {
-  const port = await getCorePort();
+  const port = await getPort(payload.modelname);
   return (
     window.fetch(`${HOSTNAME}:${port}/${PREFIX}/save_to_python`, {
       method: 'post',
@@ -194,12 +198,13 @@ export async function saveToPython(payload) {
  * @param  {object} payload {
  *   filepath: string
  *   moduleName: string (e.g. natcap.invest.carbon)
+ *   modelId: string (e.g. carbon)
  *   args_dict: JSON string of InVEST model args keys and values
  * }
  * @returns {Promise} resolves undefined
  */
 export async function archiveDatastack(payload) {
-  const port = await getCorePort();
+  const port = await getPort(payload.modelId);
   return (
     window.fetch(`${HOSTNAME}:${port}/${PREFIX}/build_datastack_archive`, {
       method: 'post',