Clamshell tuning-up

Low Level of difficulty:

Installation of an airport card for WLAN
Expansion of memory
Connecting an external hard drive via USB / Firewire
Connecting an external CD / DVD drive via USB / Firewire
Replacement of the battery by a more powerful model

Middle Difficulty

Installation of an internal DVD drive

High degree of difficulty

Mounting of an internal hard drive (ATA, up to 128 GB)

Overclocking of the processor by Logicboard modification