I match drilled the rear spar for the 5 hinge bracket assemblies. Deburred all etc. I elected to prime the VA-146 bearing housing. I am using SW988 self etching primer. It dries fast and goes on well.Then assemled the HS-411 bracket. I clamped the whole thing to the work bench and wrapped tape around the bearing to protect it from a wandering rivet gun. The first rivet came out well.