diff --git a/vall_e/config.py b/vall_e/config.py
index 5c47122..cdf3ac6 100755
--- a/vall_e/config.py
+++ b/vall_e/config.py
@@ -247,6 +247,8 @@ class Model:
 
 		if self.size == "double":
 			return 24
+		if self.size == "extended":
+			return 16
 		return 12
 
 	@property
diff --git a/vall_e/engines/__init__.py b/vall_e/engines/__init__.py
index 35e163d..2ae2fef 100755
--- a/vall_e/engines/__init__.py
+++ b/vall_e/engines/__init__.py
@@ -65,6 +65,8 @@ def load_engines(training=True):
 
 				params['d_coef'] = params['lr']
 				params['lr'] = 1.0
+			elif cfg.hyperparameters.optimizer.lower() == "adagrad":
+				optimizer_class = ml.Adagrad
 			else:
 				raise ValueError(f'Optimizer specified not implemented: {cfg.hyperparameters.optimizer}')
 
diff --git a/vall_e/models/ar_nar.py b/vall_e/models/ar_nar.py
index 3e4568b..85dda43 100644
--- a/vall_e/models/ar_nar.py
+++ b/vall_e/models/ar_nar.py
@@ -342,10 +342,10 @@ def example_usage():
 		'n_tokens': 1024,
 		'd_model': 1024, # 256, # 1024, # 1536
 		'n_heads': 16, # 4, # 16, # 24
-		'n_layers': 12, # 32
+		'n_layers': 16, # 32
 		'n_experts': 1,
 
-		'l_padding': 8,
+		'l_padding': 8 if cfg.fp8.enabled else 0,
 	}
 	"""
 	kwargs = {
@@ -367,6 +367,7 @@ def example_usage():
 	model = AR_NAR(**kwargs).to(device)
 	steps = 500
 	optimizer = ml.Prodigy(model.parameters(), lr=1.0)
+	#optimizer = ml.Adagrad(model.parameters(), lr=1.0e-2)
 	#optimizer = ml.AdamW(model.parameters(), lr=1.0e-4)
 
 	engine = Engine(model=model, optimizer=optimizer)
diff --git a/vall_e/utils/wrapper.py b/vall_e/utils/wrapper.py
index e22c037..1a8e122 100755
--- a/vall_e/utils/wrapper.py
+++ b/vall_e/utils/wrapper.py
@@ -42,10 +42,12 @@ if cfg.bitsandbytes.enabled:
 	Adam = bnb.optim.Adam8bit
 	AdamW = bnb.optim.AdamW8bit
 	SGD = bnb.optim.SGD8bit
+	Adagrad = bnb.optim.Adagrad8bit
 else:
 	Adam = torch.optim.Adam
 	AdamW = torch.optim.AdamW
 	SGD = torch.optim.SGD
+	Adagrad = torch.optim.Adagrad
 
 # handles generically converting to a specific tensor type and converting back (implemented solely for bfloat16)
 @contextmanager