Any motion for a new trial based upon any of the grounds set forth in subdivisions 1, 2, 3 or 4 must be accompanied by an affidavit stating in detail the facts relied upon in support of such motion for a new trial. Any motion based on subdivisions 6 or 7 must set forth the factual grounds therefor with particularity. On a motion for new trial in an action tried without a jury, the court may open the judgment if one has been entered, take additional testimony, amend findings of fact and conclusions of law or make new findings and conclusions, and direct the entry of a new judgment.
Id. Fam. Law. P. 807