I have a column chart that can have a variable number of columns. I would like a slight gap between each column, but I'd like it to be consistent no matter how many columns there are or how wide they are. I've tried groupPadding and pointPadding, but if you use a static value the padding seems to vary depending on how wide the columns are. See this example:

http://jsfiddle.net/JxCEh/

It would be nice to have a way to define a fixed padding in pixels or points that always stays the same.