Brief Description: Longeron - Fit 721 Aft Canopy Deck to Longeron.
A little confusion here. The end of the 721 is suppose to be 28 1/4" from the end of the longeron. But, the perpendicular line on the longeron is not parallel to the end of the 721.
Question? how to locate 721 to longeron Answer. See Image 2 that shows the 18 1/4" demension is on the outside of the longeron, not the inside.
Image 3 shows precise placement of the 721 to longeron using 28 1/4" on the outside. I had the tape clamped at 2" on the end. That's why the image shows 30 1/4" instead of 28 1/4"