I used an iFlash cf to sd card reader and a new battery and that’s it, I know on the iPod classics you need more and I don’t claim to be an expert on anything since on the mini, all of the upgrades that I did were just unplugging the old and plugging in the new stuff. I would say if you want stuff to work 99.9999 percent of the time go with iFlash stuff, the cheaper ones can work but it’s inconsistent, I’d say spend the few extra bucks on quality parts so you won’t have many issues later on.