Everything that is in the file should both be honored and protected from being really wrong, but we haven't tested everything for insane extremes of course.
You can adjust for wider / taller/ whatever arcs and bars. The adjustments are there because they work. We would have done "small, medium, large" if there was a limit.
We are ok with you adjusting things in the file- that's why we made the file in plain text, and we hoped some advanced users would do some neat things with it.
We hope to make the editor in SkyView better someday with more options, but it's just one more of those things on the long list right now and isn't one of our priorities. Not sure we ever plan on doing a PC editor, but if someone else wants to do that it would sure be a neat tool.
One thing we will do is make movement in the editor quicker. The delay in large movements now is due to a way a bit of the code works and we do expect to redo that shortly so it will be easier to move things.
We also hope to document the file format better in the future (We already have for making your own sensors), but we also tried to make it as obvious as possible. We're happy to answer questions about it too.
Just one note, anything in the config file can be individually imported. So if you want to just adjust the Tach size, you can literally just import that one line. The file doesn't need to be whole to import it.