Excellent work Kile.
The module way is a more compatible approach.
It happens I have a Th9x but I also have a JR Tx.
Is there any open source firmware for the JR ? not that I know about...
Even if it existed, am I ready to go dig an solder inside my JR ? no...
I have a RTF UM P51 Tx that I plan to gutter so I can make a module from, and even with the th9x, I'll go with the module approach from the "Build your own DSM2 transmitter module (its working!)" thread.
I really like the simpler plug unplug a module way, not talking about the fact that I can share the module between my Tx's