diff --git a/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java b/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
index ab58a52..039bc0b 100644
--- a/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
+++ b/src/main/java/io/ib67/sfcraft/module/supervisor/web/SchematicUploader.java
@@ -5,6 +5,7 @@ import com.mojang.brigadier.Command;
 import com.mojang.brigadier.CommandDispatcher;
 import com.mojang.brigadier.context.CommandContext;
 import io.ib67.sfcraft.config.SFConfig;
+import io.ib67.sfcraft.inject.MinecraftServerSupplier;
 import io.ib67.sfcraft.module.SignatureService;
 import io.ib67.sfcraft.module.supervisor.WebHandler;
 import io.ib67.sfcraft.util.Helper;
@@ -43,6 +44,8 @@ public class SchematicUploader extends WebHandler {
     SFConfig config;
     @Inject
     SignatureService signatureService;
+    @Inject
+    MinecraftServerSupplier serverSupplier;
 
     @Override
     @SneakyThrows
@@ -103,12 +106,19 @@ public class SchematicUploader extends WebHandler {
             return;
         }
         var signRaw = Base64.getUrlDecoder().decode(context.queryParam("sign"));
-        var verifiedSign = signatureService.readSignature(Unpooled.wrappedBuffer(signRaw));
-        if ((verifiedSign.permission() & PERMISSION_UPLOAD_SCHEMATICS) == 0) {
-            context.result("Permission denied!");
+        try {
+            var verifiedSign = signatureService.readSignature(Unpooled.wrappedBuffer(signRaw));
+            if ((verifiedSign.permission() & PERMISSION_UPLOAD_SCHEMATICS) == 0) {
+                context.result("Permission denied!");
+                context.status(403);
+                return;
+            }
+            context.attribute("sign", verifiedSign);
+        } catch (Exception e) {
+            context.result("Invalid signature. Please re-run /upload schematic in game.");
+            context.status(400);
             return;
         }
-        context.attribute("sign", verifiedSign);
         var files = context.uploadedFileMap();
         var name = context.pathParam("name");
         files.forEach((k, v) -> handleUploadSchematic(context, name, v));
@@ -128,24 +138,23 @@ public class SchematicUploader extends WebHandler {
         if (fileName.length() <= 10) return;
         var baseFileName = Helper.cleanFileName(fileName.substring(0, fileName.length() - 10));
         var sign = context.<SignatureService.Signature>attribute("sign");
-        //var player = serverSupplier.get().getPlayerManager().getPlayer(sign.issuer());
-        ServerPlayerEntity player = null;
+        var player = serverSupplier.get().getPlayerManager().getPlayer(sign.issuer());
+        log.info("Handling file {} from player {}", fileName, sign.issuer());
         if (fileName.endsWith(".schematic") || fileName.endsWith(".schem")) {
             Files.write(SCHEMATIC_DIR.resolve(baseFileName + ".schematic"), file.content().readAllBytes());
             log.info("Saved " + fileName + " as a schematic.");
             if (player != null) {
-                player.sendMessage(Text.literal("Schematic " + baseFileName + " has been saved!").withColor(Color.GREEN.getRGB()));
+                player.sendMessage(Text.literal(sign.issuer()+": Schematic " + baseFileName + " has been saved! Use //schem list to find it").withColor(Color.GREEN.getRGB()));
             }
         } else if (fileName.endsWith(".litematic")) {
-            log.info("Handling new litematic: {}", fileName);
-            try (var converter = new LitematicConverterV3(file.content(), new NbtSizeTracker(config.maxSchematicSize, 16))) {
+            try (var converter = new LitematicConverterV3(file.content(), new NbtSizeTracker(config.maxSchematicSize, 64))) {
                 converter.read((name, nbt) -> {
                     name = baseFileName + "-" + name + ".schematic";
                     try {
                         NbtIo.writeCompressed(nbt, SCHEMATIC_DIR.resolve(name));
-                        log.info("Schematic " + name + " has been saved!");
+                        log.info(sign.issuer()+": Schematic " + name + " has been saved!");
                         if (player != null) {
-                            player.sendMessage(Text.literal("Schematic " + name + " has been saved!").withColor(Color.GREEN.getRGB()));
+                            player.sendMessage(Text.literal("Schematic " + name + " has been saved! Use //schem list to find it").withColor(Color.GREEN.getRGB()));
                         }
                         context.result("Success!");
                     } catch (Exception e) {
diff --git a/src/main/java/io/ib67/sfcraft/util/TypedNbtList.java b/src/main/java/io/ib67/sfcraft/util/TypedNbtList.java
new file mode 100644
index 0000000..2722224
--- /dev/null
+++ b/src/main/java/io/ib67/sfcraft/util/TypedNbtList.java
@@ -0,0 +1,24 @@
+package io.ib67.sfcraft.util;
+
+import net.minecraft.nbt.NbtElement;
+import net.minecraft.nbt.NbtList;
+
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.List;
+
+public class TypedNbtList extends NbtList {
+    public TypedNbtList(List<NbtElement> list, byte type) {
+        super(list, type);
+    }
+
+    @Override
+    public void write(DataOutput output) throws IOException {
+        output.writeByte(this.getHeldType());
+        output.writeInt(this.size());
+
+        for (NbtElement nbtElement : this) {
+            nbtElement.write(output);
+        }
+    }
+}
diff --git a/src/main/java/io/ib67/sfcraft/util/litematic/LitematicConverter.java b/src/main/java/io/ib67/sfcraft/util/litematic/LitematicConverter.java
index b5e4535..e5d145f 100644
--- a/src/main/java/io/ib67/sfcraft/util/litematic/LitematicConverter.java
+++ b/src/main/java/io/ib67/sfcraft/util/litematic/LitematicConverter.java
@@ -1,9 +1,11 @@
 package io.ib67.sfcraft.util.litematic;
 
+import io.ib67.sfcraft.util.TypedNbtList;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import lombok.SneakyThrows;
 import net.minecraft.nbt.*;
+import org.apache.commons.compress.utils.Lists;
 
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -76,7 +78,8 @@ public class LitematicConverter implements AutoCloseable {
     }
 
     protected NbtList convertToWETileEntities(NbtList tileEntities) {
-        var weTEs = new NbtList();
+        var weTEs = new TypedNbtList(Lists.newArrayList(), NbtElement.COMPOUND_TYPE);
+
         for (NbtElement _tileEntity : tileEntities) {
             var weTE = new NbtCompound();
             var tE = (NbtCompound) _tileEntity;
diff --git a/src/main/resources/sfcraft.accesswidener b/src/main/resources/sfcraft.accesswidener
index 2e8c5c9..dc5ba10 100644
--- a/src/main/resources/sfcraft.accesswidener
+++ b/src/main/resources/sfcraft.accesswidener
@@ -1,2 +1,3 @@
 accessWidener v2 named
-mutable field net/minecraft/item/Item registryEntry Lnet/minecraft/registry/entry/RegistryEntry$Reference;
\ No newline at end of file
+mutable field net/minecraft/item/Item registryEntry Lnet/minecraft/registry/entry/RegistryEntry$Reference;
+accessible method net/minecraft/nbt/NbtList <init> (Ljava/util/List;B)V
\ No newline at end of file