until a decent balance was achieved
Give me that again? You created a dry but noisy track and a corresponding corrected, but bubbly track and faded between them until you got a good show? Did you get that from printed instructions anywhere?
I did notice that you could benefit from DC Removal. I amplified your work to see what was there and the battery voltage was significant. Effect > Normalize > Remove DC. Do this before you start editing or effects. DC or battery voltage inside a clip or song can mess with a number of tools.
Then, you can amplify your noise selection before you take the profile and that should give the system a booster shot. I think that’s actually what the Sensitivity control does, but I’m not the expert.
The two removal systems are very different and you can’t, last time I looked, get from one to the other with adjustments.
I used to have a krib sheet of what the controls did, but I don’t think I can do that since the last version.