Firstly, I ruined my iPod because these instructions are inadequate and do not describe the actual difficulty level which is high. Secondly, fluxed desoldering braid of the appropriate size should be INCLUDED in the kit. It's not like one can go to Home Depot and get the stuff, so it should be included. Two inches of the braid out of a 10' roll(which costs on the average $3 retail) is all that would be required. This screwed me. Thirdly, desoldering the tiny battery terminals requires a fine tip iron. No mention of that.
I ruined the Nano but I'm not too upset as I have another one which will need a battery change sometime as well so I'll just save the trashed one to use for parts and use this battery when the time comes. However the iFixit people need to re-evaluate the kit AND the instructions and make some revisions. iFixit assumes that everyone was born with microsoldering skills and has all the appropriate equipment and that is just not true.