[JHinc]

Perhaps take a look into yeast cultures. There are many different types that can add some sort of flavour to your beer. Adding syrups can affect your foam stability.

Adding cestes with the boiling is more likely to have a lesser affect on the foam stability. Might give a bitter taste to the beer. Dont know during the yeasting, you might want to be carefull not to lower the ph during the fermantation to much cause this will have a negative effect on the yeast...

Sounds like an intresting plan tho keep us informed on what you did and how it turns out!