diff --git a/users/zeyer/experiments/exp2024_04_23_baselines/ctc_claix2023.py b/users/zeyer/experiments/exp2024_04_23_baselines/ctc_claix2023.py
index 581fc682a..f84cf4bfd 100644
--- a/users/zeyer/experiments/exp2024_04_23_baselines/ctc_claix2023.py
+++ b/users/zeyer/experiments/exp2024_04_23_baselines/ctc_claix2023.py
@@ -480,6 +480,49 @@ def py():
         env_updates={"PYTORCH_CUDA_ALLOC_CONF": "expandable_segments:True"},
     )
 
+    from .model_ext.ctc_sep_net import ModelSepNet, FeedForwardNet, ctc_training_with_sep_net
+
+    # Time downsampling 6 (standard), spm10k.
+    # Separate FF net.
+    ctc_train_exp(
+        f"n12-spm10k-sepFf_alpha05-auxAED-b150k",
+        config_96gb_bf16_accgrad1,
+        train_def=ctc_training_with_sep_net,
+        model_config={
+            "ctc_model_cls": rf.build_dict(ModelSepNet)["class"],
+            "separate_enc_net": rf.build_dict(FeedForwardNet),
+            "enc_conformer_layer": rf.build_dict(
+                ConformerEncoderLayer,
+                ff=rf.build_dict(
+                    ConformerPositionwiseFeedForward, activation=rf.build_dict(rf.relu_square), with_bias=False
+                ),
+                num_heads=8,
+            ),
+            "feature_batch_norm": True,
+            "num_enc_layers": 12,
+        },
+        config_updates={
+            **_get_cfg_lrlin_oclr_by_bs_nep_v3(150_000, 100, batch_size_factor=_batch_size_factor),
+            "optimizer.weight_decay": 1e-2,
+            "max_seq_length_default_target": None,
+            # Note on max seq len stats: Before, when we used max_seq_length_default_target=75 with bpe10k,
+            # out of 281241 seqs in train, we removed only 71 seqs.
+            # With max seq len 19.5 secs on the audio, we also remove exactly 71 seqs.
+            "max_seq_length_default_input": 19.5 * _raw_sample_rate,
+            "__train_audio_preprocess": speed_pert_librosa_config,
+            "speed_pert_discrete_values": [0.7, 0.8, 0.9, 1.0, 1.1],
+            "aux_attention_decoder": rf.build_dict(TransformerDecoder, num_layers=6),  # purely used for training
+            "use_fixed_ctc_grad": "v2",
+            "sep_net_grad_interpolate_alpha": 0.5,
+        },
+        post_config_updates={"log_grad_norm": True, "__multi_proc_dataset_opts": {"num_workers": 25}},
+        vocab="spm10k",
+        train_vocab_opts={"other_opts": {"class": "SamplingBytePairEncoding", "breadth_prob": 0.01}},
+        dataset_train_opts={"train_epoch_split": 1, "train_epoch_wise_filter": None},
+        # avoid OOM
+        env_updates={"PYTORCH_CUDA_ALLOC_CONF": "expandable_segments:True"},
+    )
+
     from i6_experiments.common.setups import serialization
     from sisyphus import gs