J, I have been out of town over the last weekend and just caught up on your progress. Man, do you get any sleep, wow so much done so fast. Wish I could have seen your post on the flying stab sooner. Here's a link to my A6 Intruder thread in the EDF forum and how I do flying stabs.
You might want to look at it and see if it helps with your concerns about the glue joint around the depron. Look at Post #227. It has the pictures on how I do a flying stab. I think what I have done distributes/reduces the stress/load across more than just the glue joint on the spar. Not suggesting yours isn't the way to go, but wondering if this would be another solution for future builds. I haven't had one fail using this method.
Anyway, the build is looking great!