rotos are not all equal my 10 would start that with no issue and its not even the heaviest one of the three then they sold, one more hocus pocus gizmos than the mid level one. People talk about rotos, they are not the same in their abilities. I also have the most basic one from same company bare minimum 3 HP unit started 3 Hp fine combo machine has a shaft with a saw and mortiser other end beside the jointer planer head. The 3Hp would start more than rated for and it was the bare minimum one they sold.