I have a Futaba 9C and I always remove my Module before using it with Realflight G2. The green RF light on the Tx is on while using the simulator, so that tells me that it is emitting a signal. Plus my battery last a lot longer with out the module in place while I am seating at the computer. With the green RF light on and the antenna down for an extended amount of time, this will make the internal componets over heat and cause problems in the long run. It only takes a second to remove the module. Just be sure to place the module out of harms way.