You probably did do the right thing cutting it into smaller pieces Kevin. Look over it carefully and hit anything that looks like a crack with the real thin CA glue. Doesn't take much, the capillary action sucks it right into the crack. You'll still have to put it up till it dries though. I've had pretty good luck doing this with ebony, snakewood, ironwood, koa... things dry out real fast out here in this low humidity...
Most of the Ebony I've had my hands on is dense enough I'm not sure if stabilizing would do much good either guys.