Your corrections were flawless. Both Sections 27 and 28 are pl ok.
With respect to the Click removal tool, I've never changed the settings on it. The only setting I changed on the noise reduction is in the first box at the bottom. 12dB for the amount of the reduction instead of 8 (I have a tendency to have a lot of background noise for reasons I don't understand).I use a headset mike so it sits an inch or less from my mouth. If you are using a stand alone mike, I think around 6 inches is sort of the standard. My recording volume slider is set to .46. You might be able to get away with even a little less, although let the mike do the work, don't shout in order to be heard.
Let me say that I'm an amateur at this (a long time ago I did a little radio work, but digital was no where in sight then). Sound engineering is not my thing, but I have picked up tidbits here and there from other librivoxers and users of audacity. (I am also currently playing around with my settings in audacity because I am temporarily suffering a medical condition which gives me slushy esses. If you heard my raw recordings, you would want to put on a raincoat every time I said an 's' sound. Fortunately, I have managed to reduced that in my finished work.) In particular, I recommend the videos produced by philchenevert, an experienced librivoxer who began creating videos on how to do librivox stuff. The link to the page of videos is here: https://wiki.librivox.org/index.php?title=Instructional_Videos
Peter, I hope all this was helpful. If I can answer anything else, please do not hesitate to ask. If I don't know it, I'll help you find someone who can answer the questions.
Many thanks,
Philip