Engine Balancing

Here is a great site that brings up two methods of balancing an engine.
1. As a Whole
2. Each set of components is balanced
The second methods allows you to change only one component and keep the engine balanced, so long as the new stuff is balanced.
Ex. if the crankshaft is balanced along with the flywheel and you swap the flywheel for another the engine goes out of balance, but if you balance the crank separate of the flywheel then you can swap the flywheel for another one that must also be balanced on it's own.
Here are the links:
Part 1: Theory
Part 2: Explained
Part 3: DIY

This method does not work, I tried it this morning. But that's probably because I'm borderline handicapped and lacing my shoes is a challenge.

Where do you get off knocking velcro?