Thanks, glad you like the small sizes.
By "thin", do you mean narrow and condensed, or do you mean the weight of the stems? For the former I wanted a decent amount of code to fit on a line -- I tend not to like the expanded look of some fonts and prefer something a bit more condensed. If you mean the weight, that's something of a design constraint due to trying to keep it crisp at low resolutions by grid-fitting to whole pixel boundaries.