@littlek,
Perfect, thanks.
Wow, the 55-75 db range is definitely serious. That's going to be tricky to address with a hearing aid, I see that.
I had a pretty "normal" slope audiogram, that is, exactly reversed from yours though the variations weren't quite so wide. (5 to 75, wow! 5 is barely anything, really normal hearing -- all the way to 20 is not that big of a deal.)
I wish I knew more about current hearing aids so I could give you more specific advice. I guess keep fiddling and see how it goes.
There probably are two separate issues: 1.) getting the optimal setting and 2.) getting used to using the hearing aid for sounds you haven't been hearing (the 35-75 range ones). If you had a perfectly typical slope with losses in the 35-75 range there would definitely be an adjustment period. So that's an element. But complicated by the fact that you have an unusual slope.
Keep us posted...