Just began the empennage. Page 7-8 Fig 3 is Riveting the R-1004 Bottom Rib to the Right skin. The aft most rivet is in a very tight space. I cannot get a bucking back or even no hole squeezer yoke in there. The directions call for no other options than an AD3-3 rivet. However when attaching the Left skin to this Bottom Rib Page 7-9 Step 7 calls for using a CCR264SS3-2 blind rivet in the aft most location. How did you do that aft most rivet in the right skin? Do you or is it allowed to use a blind rivet on each skin at this location?