Hi. Get a kubrick copy. that should allay your "oh crap I broke it" fears.
I PM'd you some other stuff.
Okay... RE the diffs: http://www.christian-hoff.com/?p=44
(read the comments I already asked)
and http://www.christian-hoff.com/?p=16 https://www.mobileread.com/forums/sho...7&postcount=23
A 4 implementation https://github.com/pepijndevos/kindle4-linux
there is more stuff "out there"