> I don't know why a JR interface would be harder, it's only 2 wires,
> but then, maybe it's digital or something that makes it complicated?

JR uses the same PPM signal format (albeit different voltage).
If some vendors don't sell interfaces for JR, this means that they don't know $h1t about RC!

What's the point in buying a parallel or serial interfaces for FMS when you can do it yourself? Go to FMS forum (there's a link on FMS fite to their forums) or search RCUniverse--there's plenty of info for parallel and serial interface schematics, including JR.
[>:]