[NTG-context] disable expansion for one single component

Hi all, for a book I'm typesetting, I use adobe minion and have enabled protrusion=pure,expansion=quality in the typescript and then \setupalign[hanging,hz] in the main environment. Now it turns out that in one of the components/chapters of the book, this messes up the spacing of some characters. Is there a way to disable expansion (but not of course protrusion) for one single chapter? Thanks, and all best Thomas