I have the QSI Aristo PnP soundcard/decoder installed in a Bachmann K-27. I also have the their G-wire receiver that allows me to use the Airwire throttle. I decided to purchase the QSI Quantum Programmer to make life easier as far as programming CVs goes. After spending nearly 2 hours loading the software and trying to get the PC to talk to the engine I figured out how to do it. The problem (which QSI NEVER BOTHERS TO MENTION) is that you MUST have the G-wire receiver disconnected from the decoder. Otherwise, the two will never talk. I plan to call QSI today and let them know about this issue. Once I got the two "talking", it is very easy to now change CV settings on the decoder. It's much easier (and reliable) than using the Airwire throttle to do this task.