What version of Espressobin did you do this on? My guess that your build was the V5 just because of the timing of your post … I want to replicate what you have done. It seems to me that the only major difference between V5 and V7 is DDR3 => DDR4 … I think I will purchase the V7 Espressobin.
BTW, this was an amazing blog post! I have been reading about building my own firewall for a while and you seem to be the best resource for doing that 