I feel like a convection oven might be the next level of reliability in this space. You should at least get very even heating since the airflow is fast enough to be turbulent.
Reflow is supposed to be done with convection heating, not radiant heating. The industrial reflow machines are all pure convection. Usually with rather low air speeds, to keep from knocking the parts off the board during soldering. There are good options starting around $1500. Unclear why there's such a huge price jump from the IR rod ovens at $200 and the convection ovens around $1500.
They make convection toaster ovens that are about twice the price of basic toaster ovens. The huge price difference on ovens branded for reflow work is almost certainly because of the lower volume of that market.
