RE: Is it possible for a defective servo to cause a receiver to go defective?
The RCD 3500 RX is an 8-channel unit. There is no dedicated channel slot for the battery with this RX -- most users use the 8th slot. You can insert your battery in any available slot. Since you need to use channel 8 for your split elevators you can insert the battery in the channel 5 slot. If you have a real complex airplane and need all 8 channels, you can Y-connect your battery with any of the servos.