Indeed I am using that version of the base, cm-12.1-20160704-UNOFFICIAL-hammerhead-nocheck.zip. I too have a 16GB variant. That android support is my main reason for trying so hard to get this to work, I need that working so the CM13 version is not a viable option for me. I may just end up back on 2.0.4.13, even though I would much rather have something newer. I have reset back to three different stock firmwares, I have tried several versions of TWRP, I have tried MultiROM, I have tried Philz Touch and CWM recoveries, I have even resorted to trying other CM12.1 versions, some older, some newer. Nothing has gotten it anywhere and it's only these 3.x.x CM12.1 versions that are affected. I am stumped.