This update adds an option toallow the user to control the size of the highlight for smaller characters within a custom font.
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The image below shows the effect of using offsets that increase in value (trying to get the highlight nearer the centre of the character without going too far). The optimum size offset seems to lie between 20 and 30 for this particular custom font but for smaller or thinner characters (such as punctuation marks) this does not work well.
The new modifier option allows you to set a value for such characters (nominated in the thinner character option). The modifier values are shown for the different full-stop (period) characters in the image below with a highlight offset of 25 for the main characters.
Link to Version 0.1 guide for new users.