Drilled HS-00005 and HS-00006 to HS-603PP Spar. Used the #40 here (see silver clecoes in last picture) The fitment is perfect!! So happy with this process and having such a good time doing this! Trust yourself on this process. I've been watching alot of videos of other builders and I feel like I'm doing great on this project. Trying to keep the scratches to a minimum by doing this on towels folded up to cushion the parts.