i have done some research and it looks like the schematics are the same with just different ICs, the only differences seem to be in the A1 board (video board with VGA connections that processes video signal and sends to the tube) and the N board (CPU board)
not 100% sure about everything else so i will need to research this, but if i am correct i can easily turn my G520P into a C520K by swapping 2 circuit boards, not sure where the eeprom chip is, so unless its on one of those boards i will have to flash it to a C520K
of course thats if no one buys my C520K on ebay.
edit: looks like the TXD and RXD pins for the ECS go to the N board, so i would assume the EEPROM is on the N board
Last edited by superchad; 08-20-2014 at 08:59 PM.