We have just returned from the hanger after visiting with the mechanics, who are tired of seeing our faces and are telling us so! They are pretty sure (yeah, we heard that before) that they now have isolated the leaking part. They have replaced it and are about to run up the engine again.
Following protocol they should be in the air within an hour to begin their test flight. Our destination is over open ocean and there are no emergency landing strips along the way. They can not take us to Midway until they know they can fly the distance without issue.

We are also still frantically searching for alternatives, but there are no planes on Midway certified to fly there by F & W. There is a possible plane on the way to Hawaii from Las Vegas and we are pursuing this.