i just finished reading the halo clone thread, which has the prime 15 recipe in it (and some variants). you can read the thread here. it's a loooong thread:
http://www.e-cigarette-forum.com/forum/diy-e-liquid/108500-halo-freedom-smooth-torque-recipes.html
http://www.e-cigarette-forum.com/forum/diy-e-liquid/108500-halo-freedom-smooth-torque-recipes.html