Glad I could help. They are a fascinating little card especially with the file structure they use, makes them pretty powerful once you get an understanding of the different triggering options. They also have a digital interface that I have not explored nor is it documented well. But there is a chance that sound could be triggered digitally vs the analog method they promote. This will give you some idea of why I like the TBS so much. It is all about easily generating your own sound files. You have been working with this 123 sound cards and are already demonstrating that the sound file building and manipulation is an enjoyable part of this hobby itself.
Just a note of caution. When working with these cards on the bench everything worked fine, but with the added electrical interference from the motors the engine trigger would not always work. IF you run into this problem you might want to think of getting another 2.4 ghz MFU and using iti in parallel . so you use the one for soley driving the electric motors.
Keep us posted.