Copy master cm300

Good afternoon all, I have recently acquired 2 copy master cm300 printers for free, yes I know they are old and quite dinosaurish​:rofl::rofl:. My aim is stripping one down for spares but using the spare print head to make a dual extruder set up as it’s a big printer. My question is which mother board do I replace the existing one with btt octopus v1 or M8P board…they must be able to run 2 extruders…many thanks Gaz