This year I started with 10-Frame and 8-Frame. The 10 Frame colony never drew all 10 frames even with heavy feeding but 8-Frame colony drew all 8 frames. After this experiment, I am leaning heavily in favor of 8-Frame. Now I have a problem. I need to fill the gap that exists in the 10 Frame. Will it be ok fill the space with styroform so it will be easier on the bees to keep the hive warm, rather than having to heat too much space?