5.9 Magnum flywheel - DIY with bolt-on weight??

Yeah, no wonder it has 3 whopping great holes in it. I am going to external balance a slant six flywheel for use with an LA 360. The stock flywheel will be getting a weight added to it like the aftermarket flywheels do. I will also do another flywheel with balance holes at a greater radius than 3.88. I'm also going to test various home balancing methods.