that good tutorial mang,
but its allot easyer to use the rectangular tool, type in the width and higth of the panel and hit enter, then with the push pull tool you give it the width of 3/4" to the panel, then you double click on the panel till is fully highligted and click on make component, name the component and youre done with the panel. then on with the next panel. the reason you make the panels as individual component is so that the panels dont merge together. and you can change the shape, angle and dimensions of a panel without affecting the other panels that are touching it.
hope that help some.
laters