All seems pretty reasonable.

One small quibble: the glyph name should probably be f.terminal instead of f_terminal.

Some typesetting engines may break the text run at the end of a word, but failing that, your 'calt' solution should work. You could even make the context depend on the existence of a problem letter after the space character.

feature calt {
sub f' space [b h k l B D E F H I K L M N P R U V W X Y Z] by f.terminal ;
} calt

Cheers,

T

Thanks.

Is the covention to use the period with a glyph variant of a character, and the underscore with a ligature?

BTW, you'd have to add quoteleft and quotedblleft to the "problems" list.

Charles