Thanks. That was very helpful. My skins have been drilled but not riveted yet so that should make it a great deal easier. My rear spar attachment was built to the 1984 plans version which is a doubler which puts the attach bolt in double shear but I don't think it gives enough edge distance compared to the current thinking so I am going to replace that as well. Thanks again for the help. This is going to be an interesting project.

Bob