I'm trying to find a way to cut neat rectangular holes in small plastic box 
lids for mounting LCD displays for hobby work.

In the past I've drilled a series of small holes, then used a coping saw to 
cut out the piece. Then file the edges smooth. This is not very neat - the 
edges are never straight lines. 

When I do something like this in woodworking, I use my router to make the 
rectangular hole, then clean up the corners. But a router on a small (e.g. 
4"x6" box) piece of plastic isn't easy.

I do have a Dremel tool, but I don't have the router attachment for it - that 
may be an option, since it is a lot smaller.

What do others out there do? Using a commercial service for a one-of box is 
probably rather expensive.

Any ideas?

Thanks

Larry

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