Without glue, assemble the ribs to the lower aft spar. Install the lower spar and the tip sub spar. Space up the rear spar with balsa scrap and
set its position at the root end. Lock everything in position with fixtures. After double checking all positions, tack glue all parts installed
so far. Install the leading edge, aligning it with the mark on the plan at the polyhedral joint. Make up the trailing edge section and pin it in position,
again the bottom of it should be flush with the bottom of the rib 4 that goes there, and it should be aligned with the mark on the plan at the root
end. Fit the tip parts. Start from the rear and work forward, except fit the WT1 part to the leading edge before tacking it to the WT2 part, the last fit. Trial fit all the
tip parts, tacking them in position very lightly to each other, not the ribs. The rib feet will support the tip parts as you do this as the
tip parts do not rest on the building board. The remainder of the tip parts will be installed as the wing tip is joined to the inner wing panel.
