Need help on these beast I've created. I've been a lurker here for a long time and I was inspired to build a cabinet incubator. The dimensions are 21" wide 37" tall and 24 1/2 " deep. It is made out of 3/4" ply with a 4" false back. I'm using a zilla thermo with a heat bulb. I scrounge up a good sized fan but not sure what it puts out for air. Enough I'm sure. I have two vent holes in the back one at top and one down bottom. I'm having a hard time getting to to stabilise. And clue as to what I may be doing wrong here? Any help would be great!