I’m fairy certain that the JSON files are specific to a particular trainer. The best thing to do is try and borrow a power meter from somebody - it’s the only way to be sure.
Elite were pretty good at fixing mine after supplying them with the power meter data.
If you want to try my JSON file then DM me your email 
I’ve sent you a direct message - might be a good idea to edit your email address out of your above post - your spam filter might go into meltdown…
Can you send me the 190 firmware file… I just bought my Trainer, and it was working fine until I need a calibration via zwift and after that the unit seems to be completely caput.
The power is all over the place. I redid the calibration using elite app (15500-16500) was the range I was getting and nothing seems to have worked.
Downloading the eeprom Tsv the values seem well off…
So I am look to just restore defaults and start again…
Can someone send me the JSON mapping. Would like to work with that too…
Much appreciated…