I have two mamba 25s and there is a slight difference I noticed. On the "servo wires" (the wire that you plug into the receiver), where they are soldered onto the board, one mamba 25 has 3 solader poitns for the 3 wires while the other mamba has something connecting 2 solder points. The picture below shows the mamba with the connection. The far two servo wire joints are connected by that brass colored thing. Just wondering what is does and why there is a difference?