@incorvia, just FYI for software release naming conventions, Particle uses a custom one detailed here: Confused about Software Release Life Cycle naming conventions
We use 0.7.0 quite successfully, although depending on what you’re doing other firmware versions might be a better fit. With the Electron, we have a blocking issue with 0.8.0, Electron power-on connectivity issues with 0.8.0-rcX, and Issues with firmware 0.7.0 details an issue with 0.7.0 on Photons.