When joined the front and rear fuselage together, I had already located the stack of 0.125” spacers that get bolted between the spars. I counted out 13 for each side and confirmed 13 in the instructions. Today, in a different bag I found 4 additional 0.063” spacers. Where do these go? Looked back at the instructions and confirmed it is 13 each side. Hmm. Then re-read and saw “13 0.125” spacers plus one 0.063” spacer” missed that part. If the number of spacers had not been correct I suspect I would have had a hard time getting rivets to align when I joined the bottom skins or on the side skins. I don't recall having any difficulty. The aluminum tube spacers between the spars inboard also fit just fine.

So now I have a potential problem. I took out the bolts and measured the gap. It's pretty consistent around 1.650”.the stack should have theoretically been 1.688”. I don't have the wings so can't measure them but will get it soon. Crossing fingers.

Not even sure how to fix it. Drill out all the rivets in the bottom skin? Would maybe need to re-drill and upsize the holes with -4s. May need to call Vans.

12/31: wing measurement came back at 1.710”. That's not good.

1/3: spoke to Van's. Need to get some more measurements and they will send to engineering.

1/5: I did experiment with using some all-thread and nuts on the inside to see how easily the spar would spread. I was able to easily achieve 1.7"+/- but it immediately closes back up. I'd be hesitant to open it to the point that it doesn't come back - it would need to inelastically deform somewhere and that's probably not good.