So it is with you and your X regarding timeshare. Tell her she can divide the hours, and you will choose which side you want. Or, you will divide the hours, and she can choose. Right now, she wants to divide the hours, and choose; of course, leaving you with the smaller piece. Whatever she offers you, just offer her the same in return. If she want's to move to NY with 60/40 her way, you offer her 60/40 your way. If she won't accept what she is offering you, why should you accept it?
Do this: Tell her to get a piece of paper, and divide into two columns. At the top, label Mother and Father. Along the left hand side, going down label the days of the week (or month, or whatever your repeating cycle of visitation is). Then, for every single hour of every single day, tell her to write down with whom the child will be. Account for every single hour of the entire cycle, so that you have a real schedule. Make sure that she swears that this is the best thing for the child, in her opinion. Then, take a look at it. If you like it (and the only reason is because you have more than 50% of the hours), then you agree to it then and there. If she is giving you less than 50%, then just scratch off the names at top, and replace Mother with Father, and vice versa. Hand the schedule back to her, and tell her you like it reversed. Since she already swore this schedule was the best for the child, she should have no problem with the switch. If she has a problem with the switch, ask her why she is proposing bad schedules for your kid. Ask her why she thinks more highly of herself as a parent than you, or why she thinks she is more important in your child's life than you. Just keep reversing the tables, until she gets the idea that you are not willing to accept less than 50%. She will then argue that you are obsessed with 50/50 (as if it were a bad thing, but this is common strategy). You tell her you are not obsessed with 50/50, you will be glad to take more than 50%, you just won't take less. Then ask her why she is so obsessed against 50/50. Keep turning the tables, all the time ready to cut a deal, but never agreeing to giving her a better deal than you are getting yourself. Good Luck.