..Does anyone remember the dodgy china soldering video that show someone doing PCB assembly and soldering ICs on by flooding them with way too much solder to make a bridged mess. Then hitting the PCB on the bench to remove all the excess solder?
That's a lot of unnecessary work, solder flying everywhere,
and more work cleaning up
Why not cable tie the boards via the screw holes to a clothes line,
and start wacking with a heavy duty wooden wok implement
and let gravity do it's thing.
Done!