Hello! I'm waiting (a few months from Japan to Brazil) CM-500 serial ZD41184, it looks like an older unit, it only have the GS logo . This mod will work with any version of the CM-500, right?
When it arrives I will give a try in the mod. Just need to figure out how to burn a 27c512 in a NIC. Some fellow people of Vintage Computer Forum done this a few times.

Thank you guys, this will be awesome.