Welcome to the hive, Hornet! The disc is now approved for PDGA tournament play, and Ace Race copies are legal. Please spread to the word to other Ace Race players.
Hornet will be released to the general public soon; we plan on running the production version in Z plastic with a max weight of 178 grams.
The ESP (Ace Race) version has been given a stability rating of 2.0.http://discgolfacerace.com/