I know this is off-topic for the thread, but I am in the same situation as you with radio.Thank yoy for making it possible for me too to test a 7.8 ROM. This is the first one that works on my phone as I cannot update my radio somehow !?!.
Is it possible to double the HTC Hub tile? That would be nice. Does somebody know if it is possible to add another display language? I already tried the files from Siant but that doesn't work for me. I get an error message.
Could you please give details of what radio are you stuck to? If you can successfully flash only this ROM, then I am assuming you are stuck on radio 17.x.x.x
I am able to flash all radio 17 roms and can't go back to radio 16. One way to test it would be if you can get a RUU for radio 16 stock not .nbh just a RUU. We don't seem to have it on this forum but if you find a similar version as stock tango RUU we have, then chances are you can revert back to radio 16.