Per the plans, the center seat ribs are placed with the web 2" off centerline. My pre-drilled spar also has one of the big spar bolts dead center 2" off centerline.
I have a newer fuselage kit that came with the lightening holes in the seat ribs already cut out so making the lightening hole smaller is not an option. The ribs came from the factory already notched to clear the splice plate leaving about 1/2" of web material between the notch and the lightening hole.
Unfortunately, the 1/4" splice plate + about 1/2 inch of washer/nut won't fit in the factory notch (about 3/8").
For the lower spar bolts, this is not an issue since there is plenty of material to increase the size of the notch, I went ahead and did that today.
For the upper bolts, I will likely cut out that short section of the web and then later add a doubler once the wing is bolted on. The attached piscure shows the material I will cut out and then later splice.
