There's a factory image here for A 17 Beta 3 rom, while you wait for Google to link in the Stallion to its beta rom pages.https://dl.google.com/developers/android/cinnamonbun/images/factory/stallion_beta-cp21.260306.017-factory-3f3cf3b8.zipThere was also an earlier Canary build - still with A16 build props, found here.https://dl.google.com/developers/android/CANARY/images/factory/stallion_beta-zp11.260220.007-factory-dc0897cb.zipFlash either at your own risk.