Just keeping with the times, never know when I'll get asked how to fix one. They are very fiddly markers, apart from the usual stuff, eye's, regualar maintenance, uses the same parker solenoid from shockers/nerves/some timmys (I think) so they don't require much looking after, good job as they are a pig and half to remove from the frame, done too quick and you can bust any number of stuff.
Personally I have my eye on something a bit cheaper and harder to get hold of atm.
Mr original poster guy Riccle's or something, use
www.zdspb.com use the ion section as they are pretty much the same gat's save a few differences, unless Andy has a dedicated Epiphany section (old version of the EOS), just checked, he hasn't use teh ION section