If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
I have accidentally dropped Kindle in a case a couple of times; there was no perceptible damage.
K2pdfopt is God's gift to Kindle readers. Compare a processed version of the latest paper I read with its original version.
It seems to have a lot of settings, do you simply use the standard ones?