[NTG-context] smallcaps with features in simplefont

Greetings, I’ve been trying to work through a new font scheme using simplefonts, e.g. in simple form something like this: \definefontfeature[main][protrusion=quality,expansion=quality,onums=yes] \definefontfamily[mainface][rm][Adobe Jenson Pro][features=main] \setupalign[hanging,hz] \setupbodyfont[mainface,13pt] In this setup, I do get protrusion & expansion in the text, —except when I switch to {\sc smallcaps.} Do I need to declare the caps in some other way? Thanks, David