This is the best air flow enhancer for me yet. Castings def improved. Very frustrating when I have been casting B9 resins for going on 2 yrs now. Large old oven was great, this small one is a pain in the a**. Here is a mod that is working.
Did drill holes near floor of oven (funnel is directed to one of them).
1 dollar plastic funnel, 10.00 fan from dollar general, one piece of string to tie the funnel on.