Aye. fair enough. possibly the method is nerfed or limited in some way. hard to tell through all that obfuscation and fog.
Pleased the "final result" method works for you. I was happy enough with it.
possibly there is a way via Azw3 format? but I don't know the ins and outs of embedding other bits of other formats and suspect you would end up writing an entire parser for the sake of a few pixels 
although it seems like web fonts should work to me, just not sure why I thought that. probably all that javascript kicking about in WAFS, it gets me all confused about exactly what I am talking about.
Happy you are now happy