[sdiy] DIY panel - rectangle hole

[Scott]

Hello
I'm wanting to drill out my own panel for a project I'm working on, the
midibox sequencer. (yes,I feel like I'm cheating by going to a digital
solution, but all the talk about the PSIM several weeks ago got me
thinking that maybe it is ok :)  )
there are two long rectangular displays for this project.  I've got a
drill press, and I've got the whole standard panel mount panel
construction worked out really well.  
This one is all PCB mount, and then the panel just sort of screws onto
the PCB w/ all the switches and knobs and LCD's, which means it has to
be much more precise.  I think I cam get all the holes drilled alright,
but I have no idea what to do for the rectangular holes.

Does anyone have any ideas of how I can DIY that, without buying any
expensive equipment?  The only idea I've had so far is to drill it out
all the way across, and then clean it up w/ a file, but I don't think I
have enough skill to do that and have it all straight and square.  I
know they make wood bits for drilling square peg holes, but I don't
think that would work for metal, as it's basically just a chisel w/ a
drill bit in the middle.

I remember reading a while back about something called a nibbler, or
something.  Is that what I need?  And then does that make nice clean
cuts? (I have no idea what a nibbler is, but I have a hard time
believing that it can make good straight cuts if its something that just
removes a small chunk of metal at a time)


Thanks for any ideas!