I put mine in 4 Jepp binders, might seem like overkill but I don't like them super bulging. The problem with the black binders they give you is they are too long or wide depending on your terminology. The black ones are like an inch longer than jepps so they don't fit two wide in your case. If you use the jepps you can put two chart binders and a cfm or fom per side, and once you're off OE you can take your fom out and have spare space. It's tight but they fit that way. The lidos fit in three binders if you try. Two? Sounds crazy to me.