No, it is not possible. ROS heads are produced using a separate mold, while soft heads and hard heads use a different mold system. Based on market feedback, ROS heads are currently the most popular among users, so models T3, T4, and T5 are only available with ROS heads.
If a customer requires a soft or hard head for these models, we can offer custom mold development services, or recommend choosing other head models that support soft or hard head options.