Here's the approach to take:
Don't say no, they never do..
Say "maybe, we'll, see, we'll take that under advisement."
Management never says no - they just say maybe until you go looking for a wall to bang your head against.
Give 'em a taste of their own, saying assuring, calming things like: "We value our management and want them to have the best contract possible." Drag it out two years after the amendable date, too.
[/sarcasm]
Above all, STAY in the driver's seat - good luck,and we're all counting on you.