So I just finished my first incubator build and need a little help. Its 18 wide 21 deep and 36 high. I installed a 60cfm fan and a 250 watt element. It has a 6" wide 2" deep false back that's 36" high with a 1"x6" wide gap at the bottom to help aid in circulation. I fired it up for the first time last night and have roughly a 10* difference between the too and bottom. Any ideas on how to help get then closer together (add another heat source, another fan, etc.) Thanks in advance.