There are a few cursive characters that aren't being positioned correctly and break the continuous line, research in to the Hershey fonts so far hasn't turned up any reason for the gaps so i think i might need to regenerate the font sets in an easy to consume format and build an editor for them to correct any small issues.

I may be overlooking some width data in those font files, i should know more in a few days once i get a chance to pull the font files apart with greater scrutiny.