I've got a Series B DNA 75W - it's now my only working DNA mod. The paint on the base and around the display window has gone - but it has worked perfectly from day one. There are acouple of drawbacks 1. Narrow base - can easily fall over - so it can be a tank breaker. 2. The DNA75 board has a 6V limit so the maximum resistance is around 0.6R - keep below and it's not a problem.
I prefer the display to the DNA 75C display - colour displays are a bit of a gimmick - the black background turns blue at any viewing angle other than straight on. I'm quite happy to use Escribe to set the profile for each coil. Why Evolv put the 'Monitor' graphs on the display I've no idea.
So
@JAC Vapour well done - I hope that the 'Storm' will be a success. Next time look at the DNA60 board - the same performance as the DNA75C but without the 'C' - 9V range and better performance IMHO.