I'm with the post that says>>>>>
I'm with the post that says>>>>>
Get a roll professionally developed and scanned.....
I'd still look at the scanning experience you're encountering. Can the Plustek (a rather pedestrian choice, compared to your capture equipment) really create the output you are looking for. Seriously, this would be the place I would start spending a bit of time and money ruling out. Scanning will, in my personal experience always reduce image quality in the area of focus. It's unavoidable.
With your varied choice of films and your capture equipment, it's the one common and likely weak link. Pay to have a pro lab enlarge and print from your negatives, as I mentioned before. I still think you will find "home" scanning to be much more of a challenge than you're expectations allow for.🙁