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

Im going by feel you can notice when its out of balance you can hear it too the way it idles and revs (open headers). I've been doing a lot of math for every weight I added keeping notes on what kind of a difference each one made.

the one thing that screwed me up the most was the 3 holes the factory drilled in the "neutral balance" flywheel. I finally figured out the math on there volume, it worked out to .7oz at 6.36" from center so I had to add that into my calculations finding the correct weight. I will put a post up of when I get it perfect or if my main bearings let loose from being the slightest bit out of balance lol