I began to prepare the right wing for the attachment of the leading edge. I need to make sure that the wing is level, no twist before I make anything permanent. My first step was to place the jacks under the assembly and eyeball level/sag as best I could. Then I installed the plumb bobs on each end of the wing. Next I pulled out my bubble level and placed it on the spar. I then made the adjustments with the threaded rod on the wing stand till the wing was where I wanted to be. Measurement of the plumb-bobs confirmed there was virtually no twist (I was about 1/64" out, but that is darn close to perfect). Next I cleco'd the wing skins on the assembly. This takes out any sag in the spar, and ensures the wing is square side-to-side. I then re-checked all measurements and confirmed all was good. I then clamped the rear spar to the stand and removed the 1/64" twist and rechecked measurements.
Perfect!
I then clecoed on the leading edge assembly.
I then used MSP 42/43/44 cherry rivets to attach the leading edge ribs to the spar. Van's has indicated to me via email that LP4 rivets are acceptable too when the correct grip length is accounted for, but I choose to go with the more structural cherry rivets. I managed to get the first 10 rivets installed.
