diff --git a/src/controllers/custom/getItemListsController.ts b/src/controllers/custom/getItemListsController.ts
index 92eedda0..ec768b83 100644
--- a/src/controllers/custom/getItemListsController.ts
+++ b/src/controllers/custom/getItemListsController.ts
@@ -18,7 +18,7 @@ function reduceItems(items: MinItem[]): ListedItem[] {
 const getItemListsController: RequestHandler = (_req, res) => {
     res.json({
         warframes: reduceItems(warframes),
-        weapons: reduceItems(weapons)
+        weapons: reduceItems(weapons.filter(item => item.productCategory != "OperatorAmps"))
     });
 };
 
diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index 43675663..d199ccb4 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -178,7 +178,7 @@ export const addWeapon = async (
             weaponIndex = inventory.Melee.push({ ItemType: weaponName, Configs: [], XP: 0 });
             break;
         default:
-            throw new Error("unknown weapon type");
+            throw new Error("unknown weapon type: " + weaponType);
     }
 
     const changedInventory = await inventory.save();
diff --git a/static/webui/index.html b/static/webui/index.html
index ea91f01b..780792ec 100644
--- a/static/webui/index.html
+++ b/static/webui/index.html
@@ -26,6 +26,10 @@
             </div>
             <div id="main-view" class="d-none">
                 <p>Hello, <b class="displayname"></b>! <a href="#" onclick="logout();">Logout</a></p>
+                <p>
+                    Note: Changes made here will only be reflected in-game when the game re-downloads your inventory.
+                    Visiting the navigation should be the easiest way to trigger that.
+                </p>
                 <div class="row">
                     <div class="col-lg-6">
                         <div class="card mb-3">
@@ -50,7 +54,7 @@
                                 </table>
                                 <form class="input-group" onsubmit="doAcquireWeapon();return false;">
                                     <button class="btn btn-primary" type="submit">Add</button>
-                                    <input class="form-control" id="weapon-to-acquire" list="datalist-warframes" />
+                                    <input class="form-control" id="weapon-to-acquire" list="datalist-weapons" />
                                 </form>
                             </div>
                         </div>
diff --git a/static/webui/script.js b/static/webui/script.js
index 0a3de30c..c7a0cdc0 100644
--- a/static/webui/script.js
+++ b/static/webui/script.js
@@ -69,7 +69,7 @@ function updateInventory() {
                 const tr = document.createElement("tr");
                 {
                     const td = document.createElement("td");
-                    td.textContent = itemMap[item.ItemType].name;
+                    td.textContent = itemMap[item.ItemType]?.name ?? item.ItemType;
                     tr.appendChild(td);
                 }
                 {
@@ -78,17 +78,22 @@ function updateInventory() {
                     if (item.XP < 1_600_000) {
                         const a = document.createElement("a");
                         a.href = "#";
-                        a.onclick = function () {
+                        a.onclick = function (event) {
+                            event.preventDefault();
                             addGearExp("Suits", item.ItemId.$oid, 1_600_000 - item.XP);
                         };
                         a.textContent = "Make Rank 30";
                         td.appendChild(a);
-                        td.innerHTML += " &middot; ";
+
+                        const span = document.createElement("span");
+                        span.innerHTML = " &middot; ";
+                        td.appendChild(span);
                     }
                     {
                         const a = document.createElement("a");
                         a.href = "#";
-                        a.onclick = function () {
+                        a.onclick = function (event) {
+                            event.preventDefault();
                             disposeOfGear("Suits", item.ItemId.$oid);
                         };
                         a.textContent = "Remove";
@@ -105,7 +110,7 @@ function updateInventory() {
                     const tr = document.createElement("tr");
                     {
                         const td = document.createElement("td");
-                        td.textContent = itemMap[item.ItemType].name;
+                        td.textContent = itemMap[item.ItemType]?.name ?? item.ItemType;
                         tr.appendChild(td);
                     }
                     {
@@ -114,17 +119,22 @@ function updateInventory() {
                         if (item.XP < 800_000) {
                             const a = document.createElement("a");
                             a.href = "#";
-                            a.onclick = function () {
+                            a.onclick = function (event) {
+                                event.preventDefault();
                                 addGearExp(category, item.ItemId.$oid, 800_000 - item.XP);
                             };
                             a.textContent = "Make Rank 30";
                             td.appendChild(a);
-                            td.innerHTML += " &middot; ";
+
+                            const span = document.createElement("span");
+                            span.innerHTML = " &middot; ";
+                            td.appendChild(span);
                         }
                         {
                             const a = document.createElement("a");
                             a.href = "#";
-                            a.onclick = function () {
+                            a.onclick = function (event) {
+                                event.preventDefault();
                                 disposeOfGear(category, item.ItemId.$oid);
                             };
                             a.textContent = "Remove";