I built some arrows with both 4 and 3 Blazers. It looked like the 4 Blazers stabilized the arrow better but I was getting vane contact with my rest. I say that because they flew very well even with the contact. I was getting close to a bullet hole with paper tuning which leads me to believe that either the contact was very slight or they corrected very well. I checked for contact using spray foot powder. I didn't feel comfortable with any contact at all so I stuck with 3 Blazers which also fly very well. I am using a fixed blade broadhead and flight is very good out to 40 yards. Might be farther but I haven't shot any broadheads farther then that.

Before you get all of your arrows fletched with 4 Blazers, I would have one done and check for clearance. If you don't, you may have to pay to get them all fletched again.