I just wanted to start a post discussing AC3.4. People should be aware that I'm not reviewing the code in Master or doing test flights at this time. Recently, a large set of changes went into Master related to refactoring the flight stabilization for all Copter vehicles. So far a few problems have been found related to landing detection and I'm not sure what else. So there is some risk to flying Master right now.
Unfortunately, I'm just not able to support development at all. I'm too busy trying to develop commercial opportunities. And right now I actually have a negative income and simply cannot afford a helicopter crash. I crashed a copter in December I haven't even fixed yet.
Tridge is doing some review and testing of Master on Helicopter. But I'm not sure if that means the AC3.4 release will be pushed out at the same time as Multirotors.