If the press release rumour is correct, based upon 85% loads it is roughly 1.75m, but what I am not too sure of is if the base will be an additional 4 aircraft, or 4 in total? 1.75m could be a little bit less then.
Anyway, we have been down this road before, Olney, Buster, LTNman, powerjet and others here will believe it when it is official, hopefully this time it will be?