BizJetJock ...
Not necessarily ..
(a) consider a fourth segment limiting obstacle .. you drive the second segment higher and the fourth segment will be pushed out .. perhaps enough to compromise the sums. Now, the gross to net margin gives you considerable fat in the fourth segment .. but you will be eating into the margin in this case.
(b) if there are turns involved further out, you may be compromising the plan
(c) it is likely that the third segment may be engine limited.
.. just some thoughts ...