Screencast: How to visually synchronize two PropertyGrids?

A visitor who wanted to evaluate SPG asked me this question the other day: "I want to build a view to compare two objects visually. I want to display two property grids, one for each object. But these grids must be visually sync'ed. If user expands or collapses one property or category, other grid must do the same. If user scrolls, other must scroll too. It is possible with your component?". The answer is yes with SPG 3.0.1 and I have made a screencast to show you the result:

The synchronizer class can be downloaded here (please, let me know if you find any issue with this class, I will be happy to fix it).