[NTG-context] columnset's bodyfont+interlinespace ?

Hi, when using \startcolumns I could use: \startcolumns[n=2,rule=off] \setupindenting[none] \switchtobodyfont[8.5pt]\setupinterlinespace[line=10pt] \clubpenalty=0\widowpenalty=10000\displaywidowpenalty=10000\brokenpenalty=0 ... but when using \definecolumnset[myset][n=2] \startcolumnset[myset] \switchtobodyfont[8.5pt]\setupinterlinespace[line=10pt] ... doesn't work (actually it ends in halfempty pages). How to set fontsize+interlinespace with columnsets ? Steffen