First, what you've done here is immensely cool. I don't have a plotter, nor have I ever used one, but I have been reading this with the upmost interest.
As an old Apple hardware fanboy who has felt decidedly uninterested in Apple as of late, this has made want to dig out my old M00001 and start doing cool stuff again.
Also apologies if the correction is incorrect. I just assumed some copypasta magic had happened :)
Mike Shields
Adam Mayer
matthewblain
Daniel Carbone