RE: Batshare with JR 921 2.4
You are seeing the limitations of the standard RC connector. It cannot carry much current and when you move the servos you are creating a large voltage drop across those connectors coming from the BatShare to the receiver bus. There is nothing you can do about this except add more connections from the battery which probably would be difficult at this point. This is the reason we suggest looking at a power system for the larger planes, anything around 50cc and larger.