I don't really like how buggy armabell is, so I'm currently creating an armagetron map editor
So far I've got it rendering the walls properly, and it can open any well-formed map file.
Panning and zooming also works
I'd love to here what you guys think.
I'm releasing its source totally free, and it can be found here https://github.com/Connorcpu/ArmagetronMapEditor