I think the usual technique for soldering a BGA is a lot easier. https://hackaday.com/2021/02/28/bga-soldering-and-inspection/ https://hackaday.com/2021/02/28/b

I think the usual technique for soldering a BGA is a lot easier. https://hackaday.com/2021/02/28/bga-soldering-and-inspection/ https://hackaday.com/2021/02/28/bga-soldering-and-inspection... At the bottom of the page you'll see a link to someone who followed your suggestion. Now that looks hard. :)