o_a_proj is NOT quantized by modelopt in the checkpoint (bfloat16), but the attention forward pass expects FP8 (weight + weight_scale_inv). - Create wo_a with quant_config=None to load bfloat16 weights - Add FP8 quantization of wo_a in finalize_mega_moe_weights: per-tensor symmetric quantization to float8_e4m3fn + weight_scale_inv - This matches what the fused_inv_rope_fp8_quant + einsum expects