I'm not sure whether or not I should be responding, as the questions seem to be directed to Michael, forgive me if I butt in here.
So did you gradually replace your drawn out (standard) frames with these or did you try these type of frames on a new hive?
You can do it either way, but as long as you have drawn comb, it would be best to alternate foundationless or starter stripped frames, between frames of drawn comb. That will give the bees some guidance and keep the new comb pretty straight.
Also - for the foundationless frame - do you just put together standard frames and leave out the foundation and put in the hive?
Standard frames are perfectly fine as long as you alternate them between frames of drawn comb, but some of us have constructed special top bars with comb guides, by cutting the sides of the top bar at a 30 or 45 degree angle. I prefer to insert 1 inch strips of 4.9mm foundation in standard frames, to give the bees a guide, yet still achieve natural comb in the remaining space of the open frame.
I really like the thought of the bees making their own foundation - the way it should be.
Some of us prefer naturally drawn comb, and the smaller size of natural cells as well.
To answer your original question Thom, I prefer natural comb or small cell plastic foundation. I don't like Duragilt, due to the tendency of the bees to strip off the wax in spots, and then they refuse to rebuild comb in the stripped area. I don't like wax foundation because of the hassle of wiring, and the bees seem to build foundationless comb faster than drawing plain wax foundation.