Thanks man!
Idea is to put some test pieces, Aluminum & steel plates like 1/4 thick… hang them top middle bottom on each side and a row down the middle. bring it up to temp and bake them for 20 mins… then open the door and quickly shoot them with the IR gun. to see how they absorb heat. then put an oven thermometer next to them to see how the temps are around the oven.
A hand full of guys with ovens this size say its not a necessary to have a blower to take from top and dump out the bottom, unless its high temp curing or getting into bigger ovens than a 4x4x6. but yeah. I might put something in at a later date, or if I see big differences in temps inside it with testing.