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

Yup, i'm going though this swap right now. After researching it I decided to pony up for the flywheel recomeded for my MP crate 360: http://www.jegs.com/i/Mopar+Performance/312/P5249842/10002/-1

Sucks - but I didnt like the idea of the bolt on weight.