It's very detail but some miss
If you put all 4 .zip files into ONE bootable CwMR uSD, step 9 you remove the uSD, insert the new one in, assuming it is blank then jump to step 14, you wont have the format file if you not re-insert the first usd back.
Also, flashing CwM into eMMC very convenience, yes, but it is a pain if you want to go back to stock ROM. I always preferred boot into CwM R via a bootable uSD card.
Your note in step 15, I personally do not believe it is 100% true. In my case, without an external uSD card plugged in, Aldiko Reader won't work. And yes, my system set up is like what you said.
Official CM10.1 Nightly @ 1000MHz NOOKcolor
Offiical CM10.2 Nightly on Kindle Fire 1st-Gen
Rooted Kindle Fire HD 8.9" w/ Nova Launcher
Virgin Samsung Galaxy Tab 2 10.1"
Slimbean 8.1 on Galaxy S2 i777 - LOST
Stock ROM 4.2.2 on LG-D800