I witnessed my friend's .40 U-C-Do horizontal stabilizer break at moderate speed, straight and level following medium size loop pullout; his engine was Magnum .91 four stroke. There were no flying wires. The built up joints seemed to be poorly glued; it broke at the trailing edge, followed the angled piece outward and broke at the leading edge joint too.

Putting flying wires on the tail might prevent yours from doing the same.

Good luck.
Bob