diff --git a/fafbseg/flywire/segmentation.py b/fafbseg/flywire/segmentation.py
index ca0a8b7..9df4785 100644
--- a/fafbseg/flywire/segmentation.py
+++ b/fafbseg/flywire/segmentation.py
@@ -1559,26 +1559,27 @@ def is_valid_root(x, raise_exc=False, *, dataset=None):
 
     """
     client = get_cave_client(dataset=dataset)
-    vol = cv.CloudVolume(client.chunkedgraph.cloudvolume_path, use_https=True, progress=False)
+    vol = get_cloudvolume(client.chunkedgraph.cloudvolume_path)
+
+    def _is_valid(x, raise_exc):
+        try:
+            is_valid = vol.get_chunk_layer(x) == vol.info["graph"]["n_layers"]
+        except ValueError:
+            is_valid = False
+        
+        if raise_exc and not is_valid:
+            raise ValueError(f"{x} is not a valid root ID")
+        
+        return is_valid
 
     if navis.utils.is_iterable(x):
-        is_valid = np.array([is_valid_root(r, dataset=dataset) for r in x])
+        is_valid = np.array([_is_valid(r, raise_exc=False) for r in x])
         if raise_exc and not all(is_valid):
             invalid = set(np.asarray(x)[~is_valid].tolist())
             raise ValueError(f"Invalid root IDs found: {invalid}")
         return is_valid
-
-    try:
-        # Note: FlyWire has 10 layers but FANC has 9 
-        # by using the volume's info we stay flexible
-        is_valid = vol.get_chunk_layer(x) == vol.info['graph']['n_layers']
-    except ValueError:
-        is_valid = False
-
-    if raise_exc and not is_valid:
-        raise ValueError(f"{x} is not a valid root ID")
-
-    return is_valid
+    else:
+        return _is_valid(x, raise_exc=raise_exc)
 
 
 @inject_dataset(disallowed=["flat_630", "flat_571"])
@@ -1610,24 +1611,28 @@ def is_valid_supervoxel(x, raise_exc=False, *, dataset=None):
                     Use this function to check if a root ID is valid.
 
     """
-    vol = get_cloudvolume(dataset)
+    client = get_cave_client(dataset=dataset)
+    vol = get_cloudvolume(client.chunkedgraph.cloudvolume_path)
+
+    def _is_valid(x, raise_exc):
+        try:
+            is_valid = vol.get_chunk_layer(x) == 1
+        except ValueError:
+            is_valid = False
+        
+        if raise_exc and not is_valid:
+            raise ValueError(f"{x} is not a valid supervoxel ID")
+        
+        return is_valid
 
     if navis.utils.is_iterable(x):
-        is_valid = np.array([is_valid_supervoxel(r, dataset=vol) for r in x])
+        is_valid = np.array([_is_valid(r, raise_exc=False) for r in x])
         if raise_exc and not all(is_valid):
             invalid = set(np.asarray(x)[~is_valid].tolist())
             raise ValueError(f"Invalid supervoxel IDs found: {invalid}")
         return is_valid
-
-    try:
-        is_valid = vol.get_chunk_layer(x) == 1
-    except BaseException:
-        is_valid = False
-
-    if raise_exc and not is_valid:
-        raise ValueError(f"{x} is not a valid supervoxel ID")
-
-    return is_valid
+    else:
+        return _is_valid(x, raise_exc=raise_exc)
 
 
 @inject_dataset(disallowed=["flat_630", "flat_571"])