An RX 18 is an RX 18. You should be able to get everything to function.

I typically strip all the heng long wiring off the gun and then just rewire using wiring logic I have acquired for these things. I use the smoker jack to supply constant power to the gun, and the airsoft gun wire to start the recoil action. A contact switch is attached to the recoil action to stop and start the recoil. The airsoft gun wire is used to energize this contact switch( Wire attached to the middle contact) The negative wire from the smoker jack is routed through the contacts on the switch and to the gun motor

Power to the Flash LED is supplied from the airsoft negative wire(I think it is blue ) through a resistor

I then add a contact switch on the left stick controller to perform the same fucntion as the K button on the transmitter. Left stick up momentarily energizes the blue wire. This starts the recoil, flashes the LED, and away it goes