Thanks Capt,n. I do all my hubs the same way. In the case of the LH threads on the Echo the stud replaces the machined threads on the crank. So from the outside everything will be the same as far as looks go. There will be no difference in the machining of the hub, threads, taper, etc. I could take one from a motor with regular RH threads and it will bolt on the one with the bored and tapped shaft with the stud.