As someone that has done a LOT of reflow work, I'm a little confused why you are arguing such a ridiculous notion.
First off, I think you confused C and F. The author wanted 170ºC in his oven, would would be outside the range of any existing sous vide and would be violent boil.
Second, reflow only works because of the perfectly level and no contact of parts, they need to be free to FLOAT to their destination guided by surface tension.
Oh, sorry, I was joking initially and misinterpreted your remark about it being too hot. You meant that the required temps are too hot for the circulator, which is obvious in hindsight. Thanks for setting me straight. :)
I'd still argue that a sous vide type circulator with a slight modification, a liquid with a higher boiling point, and a container for the board that doesn't involve vacuum sealing, would be better than the raw, unreliable oven in the OP. I bet it would end up costing about as much as a better solution, though.
First off, I think you confused C and F. The author wanted 170ºC in his oven, would would be outside the range of any existing sous vide and would be violent boil.
Second, reflow only works because of the perfectly level and no contact of parts, they need to be free to FLOAT to their destination guided by surface tension.