It is commonly assumed that Madara can use the perfect Susanoo, because of his eternal Kaleidoscope Sharingan, or Rinnegan. It was initially made clear that Madara was capable of the jutsu before ever attaining the Rinnegan. However:
The flashback depicts Madara with his original eyes, meaning his brother's eyes did not grant him perfect Susanoo [If anything at all]. Although it is fairly likely that Madara didn't use perfect Susanoo in every battle.