Good topic to research.
Months ago, I started my mod to iPod Photo. It might be wrong, since I just desoldered those Z caps (C84 & C86) and shorted the connections.
Instead of having the BGs inside the iPod, I installed it in the iPod dock/connector. Both have enough room for the caps.
BTW, I'm using 22uF instead of 47uF. Can sb advise what the differences between 22uF and 47uF used here?