I tried the Viking part to save time and, although I got it to fit pretty good, it looked horrible compared to the KAI approach on other RV-12's I checked out. I removed it and followed the KAI. There are a couple of good videos out there that review the Van's approach that were extremely helpful. I strongly suggest you review your efforts in attempting the KAI and reconsider. It's not that hard if do a little homework and nothing will look as good.
White Salmon, WA