Estes QCC Explorer build – Air intakes, papering fins, payload section St. Augustine Rocketeers Posted on October 4, 2020 by Luis JimenezJanuary 20, 2022 Used Avery Labels to paper the fins. They are thru-the-intake; not thru-the-tube. Kevlar to swivel to 3/8 nylon inside the booster tube, to minimize ‘zipper’ damage chances. A little safety cord for the nose cone. Fin alignment will suffice. Payload section coupler/attachment point