Being that you have an ebony front, I will tell what happened to me. I had a cored ebony front that I purchased, let it be for about a year, then started cutting it, and the last cut I took on it, I didn't re-seal it and then put it aside. About 2 months later, I went to attach it to a handle, and found a large crack at the top of it. IMO, woods such as ebony that are dense and hard, tend to do bad things when cut too often, or too aggressively, even cored, more so, as they end up with a thinner layer at the end. I personally believe, don't rush it, it will be 'soup' when it's ready to be....
Dave