The habu 32 doesn't need any modification or reinforcement to the wings or stabs to reach high speeds. There is nothing wrong with them, although taping the gaps between wings and fuse will get you more speed.
One way to get more speed and better sound on the cheap, is to drop a Wemotec EVO 11 blade rotor on the stock fan and run the stock motor.
It stays light, and with a lot of throttle management and Tam's heatsink even 7's is doable.