Station 4 and 5 wing fit
Not only is the fore and aft measurement critical, but the stagger and height is important as well. There are two drawings where I got this information. One drawing is a diagram of the upper and lower wing center points. The other drawing was a jig diagram for attaching the fittings. They proved to be quite useful.
Here's a shot of the forward attach fittings.
Measure twice cut once, right??
Here are the fittings drilled, bolted and in place.