Embraer 2000nm 5 abreast

It is no secret that Embraer looks into building a CSeries rival with an own 5 abreast aircraft. But as Bombardier's CSeries will offer a maximum range of 2950nm and the wing is designed for that range, Embraer reportedly is looking for a range closer to 2000nm, but thinks about a little larger aircraft. Scott Hamilton wondered in a recent blog entry how Embraer could achieve to build a lighter aircraft, as Ronald Epstein, the BoA analyst suggested. Here is a quick explanation: