Hello there! I'm having the same issue as Innocence a few pages back where the boot process hangs at the Google logo and will not progress past that point.

Here is what I am doing:
1. Wiping everything in TWRP except for Internal Storage
2. Flashing the CM12 base (cm-12.1-20160704-UNOFFICIAL-hammerhead-nocheck.zip)
3. Flashing SFOS either in the TWRP zip queue or individually.
4. Rebooting

I have tried several different versions including 3.3.0.16, 3.2.1.20, 3.2.0.12, and 2.0.4.13.

Out of all of those the only one that works is 2.0.4.13.

I have also tried several different TWRP versions as well as flashing back to the latest stock firmware and retrying, to no avail.

Is there something I am missing?
Any help would be appreciated!