EDM retrofit

Does anyone have any info or do you know of any links that will help
me with this problem. I am thinking of buying an older wire edm
machine and replacing the old CNC control with a Linux EMC
controller. Has anyone done this? What are the issues with EDM. I
really do not know much about wire edm but I would like to get one for
my home machine shop, however I would prefer to use a commerical unit/
with mods rather then build from scratch. Any help would be great.

Thanks

WGB