I'm keeping a close eye on this. If it progresses to the stage where it's established as safe, and they just need a larger trial with people who have less severe hearing loss to show that it works well enough to bring to market, I would certainly consider volunteering. It's encouraging to see a company working on this that is close enough for me to reach.
Although, on reflection, I probably wouldn't be considered suitable. I don't know whether my hearing loss is due to otosclerosis related to my osteoporosis. I have no idea how to find out. I'm praying it's hair cell damage instead, possibly caused by a suicide attempt with Aspirin in my teens, along with years of taking antidepressants and experiencing weight gain. Of course, it could be both.
Another thing—somebody ought to ask Rinri if they have taken the scarring problem into account. This seems to be a point of contention in the FX-345 thread. Hopefully, they have developed a solution involving stem cells, which can reverse scarring. If that technology is improving, we might still be in with a chance.