Another things is that the SINE WAVE is exaggerated in forms so it is learned. In reality whether you do HIP TWIST or SINE WAVE they are all one and the same. Sine wave does Utilize the hip twist and of course if done correctly you wont even noticed.
Hip Twist or Sine Wave? I say learn both just don't exaggerate the Sine.
Anyways, let me know how it goes in the school you found.
Bow out from Martialist