Well I feel that problematic that there is different pcb kits and even with google translator I did not find clear answer that what they contains. After reading tons of pages from forum and github it start coming more clear. Naturally it is problem that also half of github is "crypted". My opinion (it is just my own humble opinion) that if ardumower wants come really flying and live project it need to be come international and dump dual language documentation. Naturally it is choice of current developers that do they even want it. From perspective of many uav projects in 10 years. There was several great project from Germany what was years ahead (like engineering stuff usual is ahead in Germany). When Ardupilot start real international project it runs ahead quite fast and most of old projects are just dead. And do not take me wrong. My opinion of language is not political and English is not my strongest language (and I am not even good with it). It is just that I like use common standards and I feel technical potential in this project. And as engineering guy language is just technical communication protocol for me, not political or even cultural thing.