Once the FontStruct team implements metric controls, letter spacing will be user definable (as will word spacing). Until then, all letters are spaced one brick apart in the downloadable truetype files, which looks right only in special cases.

Did you notice that if you delete the corner spacers, the spacing stays the same in the FontStruct display? Shifting letters relative to the left side bearing is the “kerning trick” people have used to make the scrolling display look as proper as it currently can – but it does nothing for downloadable fonts. When these truetype files are generated only the extent of the letter forms are considered, regardless of where characters sit in the fontstructor.

So this is all to say: suggest to users the proper tracking value (which adjusts the spacing between all letters and words, as opposed to kerning which adjusts spacing between only two characters) that will give the correct inter-letter spacing and consider dropping the spacers. Granted, not all applications allow you to precisely set the tracking for a block of text, so this is far from a perfect solution. But it will clean up a bit your already excellently executed fontstruction. Great Job and – ···· ·– –· –·– ··· !!!