I acquired a little Epson HI-80 plotter the other day - for a "consumer-grade" device with a small page size it looks to be quite a nice little unit. Of course the pens are all but dried up (there's a little life left in the red and blue, enough to see that the self-test is working). So... has anyone tried adding fresh ink to these? I assume the pens themselves haven't been sold in well over 20 years. It looks like it's probably possible to open the pens up, but I assume that any replacement ink needs to be just the right consistency for it to soak into the pen tips properly but not end up all over the place. cheers Jules