DIY flat spot fix therapy is to completely loosen spokes directly above flat spot, suspend the wheel on stout pole or board and pull/hang on it with all your weight to pull the flat spot back outward enough that you can tension and re-true the wheel. Also make sure the spokes 180° from the flat spot are not too tight, pulling the entire wheel in that direction. Alternately, here are even tools made that locate on the hub and push outward on the flat spot to provide force to reset the flat spot bend.

Final terminal death of MA40 I have experience is when it cracks at an eyelet and a spoke starts pulling the eyelet through the rim.