nizcoz, no with components other method:
if not ISArcExtract( 0, 80, ExpandConstant . . .
if not ISArcExtract( 1, 20, ExpandConstant . . . in one group, can only select one
if not ISArcExtract( 2, 20, ExpandConstant . . . in one group, can only select one
// 80 + 20 = 100% read the help to IS Done, Working with the library => Manual percent setting for each operation.