I normally use a 1"-2" thick piece of foam board (16 1/4" X 19 7/8") on my hives for the winter. However, I normally place this above the inner but beneath the outer cover. Now, I understand that inner cover are not normally used with the flat wooden migratory covers. So with the understanding that some of my hives now have migratory tops, can I just place the foam board directly above the cluster, since I don't have inner covers on these hives? What do you all recommend, or do yourselves? Any and all input is appreciated. Thanks in advance!