This jig was patterned after the one in "Skybolt News." It was made from 3/4x 3/4 steel angle. I made three of them to hold the fuselage sides securely in place while all the intercostals were cut, fit and tack welded. For each member, 2 pieces of the angle were cut to just slightly longer than the width of the fuselage. Next, 2 2"x 1/2x1/2 angle pieces were welded perpendicular to the long angle where the outside edge of the longeron hits it. This acts as a saddle to positively position the jig. Finally, 2 more angles were cut and positioned vertically, secured with bolts at the bottom, and c-clamps at the top. This allowed the angle to be varied, and the jig adjusted to ensure exact alignment of the fuselage sides. By putting the vertical pieces at more than 90º angle a very rigid jig is produced.