He's paying a lawyer a lot of money for what amounts to an appeal of something that happened in court that probably has no chance of changing. Do you have a clue of what is his reason for saying he needs a change? Does he say that the income entered into the guideline formula for him is not his true income? Does he say that he has other expenses that weren't properly accounted for? If so, then maybe his lawyer will be able to get the judge to listen & realize... if a mistake in calculations was made, or if your ex wasn't given the chance to give this information to the judge at your hearing, then it's POSSIBLE that the judge will change things...

You'll want to ask your lawyer what is up with this.

Sometimes, there IS a good reason for re-consideration. Sometimes, it's just that the party who did not have a lawyer when they walked in, thiks they could have done better if they HAD had a lawyer, and now they see how much money is involved so they're FINALLY willing to pay a lawyer to get a longshot chance at changing the numbers... and there are always lawyers who will be ailling to walk into court to help someone who thinks they've been cheated... just to give him his day in court with a "mouthpiece" who can properly state his case for the judge... even though everyone involved knows that there's no likely change available to be made.

Only your lawyer will know which this is... whether there are some legitimate reasons for him to be upset... or whether everything in court was, in fact, done by the book & this is just a matter of letting him get his opportunity to have his day in court.

Good luck.

Truly, whichever way he's going, it's a longshot... but there ARE a few ways that cases can be overturned & changed... if it turns out that things were unfair on the day they were finalized, it's possible that the judge will change things to make it fair. ... but you say this was guideline... so long as no one refused to let your ex have his say... so long as they didn't steamroller over him & refuse to let him give his evidence to the judge... you SHOULD be fine.