While bumbling around the internet today I found this paper (FYI - it's almost 8 MB) on an Orthogonal Time of Flight Mass Spectrometer that has a lot of construction details and looks *relatively* simple to build. I just kind of skimmed through the paper, so I still need to go back and read it in more detail, but I thought that it might be of interest to those here. Could be a nice future project, not to mention that I already have most of the NIM modules required.
Now I have to go read up on the other MS stuff that I've already acquired.