In recent firmwares, the ezuhf has a ppm-out on ch. 1 as well, so it can be supported by the ppm input directly without ppm encoder boards.
I did have an issue which is likely my radio's ppm out stream being a bit close to the boundaries of the standard. My ROLL channel
disappeared probably for that reason, but I dealt with that by slaving Ch. 6 (Gain?) to the roll channel instead.
Here's the ezuhf.xml radio file, which seems to work perfectly, but is therefore dependent on the radio used.
I don't have my git system worked out yet, so can't create pull requests and all of that stuff. I don't have experience with that yet. I hope to set this up over the coming days so this process can become a bit quicker.