No problems noted so far. It begins to look like airplane parts. Started fitting the ribs and fluting the nose rib. The HS-710/714 are temporarily fit and it is getting close to drilling time. Plans suggest using an angle drill to final drill the HS405/702/714-710/404. Quite abit of metal to go through. I ordered an angle drill from Cleaveland. It should be here in a few days.