MagicCFG is based on the Purple tool by @1nsane_dev and uses the serial port of the iDevice to read and write to sysCFG on the NAND chip.
MagicCFG can easily create a backup of the syscfg and flash them to new NAND chips.
Next to repairs, it's the most easiest way to upgrade your Storage (f.e. from 16GB to 128GB). You don't need the expensive NAND chip readers from far east to proceed. Only desolder the existing chip, replace with a bigger one which just need to be soldered on the motherboard. Then you can do everything else with MagicCFG
Next to the repair features, there is even more to discover.
Changing color of the bootscreen from black to white, unlock your WiFi iPad from iCloud and lot more functions will be added with every update.