George,

I got your PM. Best to keep discussions in this area, PM is best for private stuff.

I am struggling to think of something to do that doesnt require removal of the tail, which you say is not really possible.

Only thing I can think of is to use Glens method again, and support with wires to form a diamond around the tail. You could try using Carbon cloth rather than Glass. Perhaps use Carbon tows on both top and bottom at the trailing edge of the stab as well, otherwise it might break again at a third point.