I bought 4.9 from brushy mountain, and it was plain beeswax. If you put that into a deep frame, it will sag. I think it may sag in a medium too. I used 4 embedded wires to keep it from sagging. Next year, I'm going to do something different with the small cell, to save some time. Instead of wiring, I'm going to use strips of #8 screen, fold them, and pinch them into the wax on the sides of the foundation. I tested it late this year, but do not know how it would do in the summer, but it should be completely drawn out by then. MB has said about using 11 frames, and that should solve my comb drawing dilemas.
I used pierco this past year, and the bees drew it out very nicely, but mite counts were alot higher than on small cell. And that was with all of the drone comb on the small cell. Still have mites, but not as many.