OK, since consulting with Sterling over at Vans (very nice guy, btw) I am going forward with the idea that I've introduced a bit of a shearing load on the rivets that hold the two sides of the HS together at the forward spar. But we don't think the load is an overwhelming factor. The plan is to cont...

I am just about to attach the rear spar to the horizontal stabilizer when I noticed this angle problem. (and I have to apologize because I seem unable to post the photo I took of the situation) Basically, it looks like this: the trailing edge of the skin of the HS is at an angle, and the rear spar i...