It is important the the ruler is a the absolute right angle to the fold to prevent V's. Before cutting your strips, line up the selvages and fold the fabric to meet the selvages. Place a large square on the double fold and this gives you the right angle for ruler cutting. After trimming, you can start cutting your strips but check with the square to make sure you are holding your ruler at the proper angle. Here are pictures[ATTACH=CONFIG]560547[/ATTACH]