Here is an update: The glue has been holding very well, but I did have one of my fans break the metal shaft the fan blades spin on. Had to throw it away, no way to fix that! Just goes to show what forces are at work.

One other thing I found out was that when you replace the wire. You want to use really thin gauge wire to solder onto the fan with. Thicker wire can break off the little tab that you solder onto rendering the fan useless.