Well it was time to drill some holes that I couldn't take back. I sort of went away from the plans here after several hours of thinking, looking and contemplating. I decided to fit HS6 and HS5 into the skin/skeleton structure, align it and clamp it very carefully until it was very tight where the ribs met HS710/714 and HS00001 doubler/702 spar. Thankfully I put center lines on the spar at an earlier stage, which made it quite easy to see it was aligned properly with the skin holes inboard of HS708. I then match drilled the holes in the aft flange of HS00005 to the rear spar, clecoed and re checked my clamps. Starting at the rear spar I match drilled the skin to the 00005 ribs, both top and bottom, I put a cleco in every hole. Once secure I did the same for HS00006. I then removed both ribs and carefully measured (like 15 times) the holes that needed to be drilled on the aft flange of HS00006 and only the top and bottom holes that needed drilled on the forward flange of HS00005. I drilled the at a #40 just in case there was an alignment issue later on when I upsized them to #30. I put the HS5&6 ribs back into the skin/skeleton, secured everything very tightly and match drilled the holes from the skin to the front spar. This worked out really really well, they were right down the center and had very acceptable edge distance at the taper. I clecoed every hole as I drilled, starting from HS708. I then clamped and drilled the flanges on HS00005 and 00006. They all turned out beautifully, except for a slight wallowing on the forward flange of HS00005 when I upsized the hole. I contacted VANS to see if this was going to be a problem, fingers crossed it wont be. I will update later with a response from them.