Thank you for your very detailed tutorial.
I just add two "issues":
1) my sandisk class 10 wasn't recognised by vconsole (XP says it is raw). I used win32diskimager which recognized the removable device.
2) I noticed after closing that the external sdcard slot had moved a bit, making the in and out less easy
As for the speed up process of loading books, I haven't noticed any change.
Thanks again for this great job.