When you bought the radio for your Pulse, did you just buy a flight pack with no TX?

When I built my second plane, I went to buy a flight pack to use the same S400 TX. The flight pack was $99 plus a crystal, or about $109. A whole S400 radio, including TX and crystals was only $119, so I had my LHS order me one on the same channel as my trainer radio. They basically give you the TX for $10, which you can either dedicate to a specific plane, use as a buddy box, use as a flight sim controller, or donate to your club as a buddy box. I ended up donating my free AMA buddy box to my club, since I now have three other JR Sport boxes and didn't really need the fourth.

Anyway, it sounds like your all set now. Good luck with your Pulse XT. I hear they are great.