F30 auxiliaries

F30 was ordered by Marcus Lothrop without an auxiliary unit, why, we shall never know, here are two videos showing a typical E type auxiliary unit, although in good Doble style there are several variants, and the second video shows what happens when you do not have this unit, this video shows the tangle of pulleys and vee belts, all modifications in the 60s/70s and 80s not Abner's solution, my thinking is that biting the bullet and fitting a proper unit would solve everything,