Turned out not being a good day for building. Began match driling the left HS skin to the HS assembly and drilled 21 holes before I realized I had a #30 drill bit instead of a #40. That was a careless and costly mistake that I don't expect to repeat again. I need to re-order the following parts from Van's: HS-702 spar, HS-707 & HS-708 ribs, and an HS-601PP skin. In the meantime, I went forward and completed the assembly preparation for the right HS.