Like Vance said, put the foundationless in between brood frames. If you put them between frames of honey, you will get lots of drone comb. I learned this lesson the hard way last year so I have a bunch of frames of solid drone comb. I leave those on the outsides and they get filled with honey. Make sure your hive is level from side to side and they should draw them out just fine. I think they build out foundationless faster than they do with foundation, especially in the middle of a flow.