You DON'T want to buy FSOne! The only other sim I've set up is FMS, but I can't imagine anyone making a modern sim as bad as FSOne. It is just one giant honking pain to set up and calibrate, especially with Hitec Txs. It uses arcane language and cutsey-pie verbage instead of Plain English instructions. It's full of errors and poorly phrased instructions. Here's the latest example that's got me wasting my time, again, trying to get it to work: On their Wireless Flight Simulator Adapter for FSOne, their printed instructions tell you to "Select JR 8103 transmitter when using the DX6 or DX7." The JR8103 transmitter is not listed in the transmitter options anywhere!