Since I received the HS-405 replacement yesterday, I continued with the HS work tonight. First I finished drilling the skin on the right stabilizer; a couple of holes were still missing. Rather uneventful. Then I grabbed the left HS to get the replacement HS-405 in place. I marked the hole positions, fluted the rib, pilot drilled the front flange, clamped the rib into the stabilizer and ... found another way to mess it up, even though the reason is similar: I didn't clamp the stabilizer to the bench. Shouldn't I have learned this lesson last time? When I match-drilled the first of the two holes which attach the rib to the rear spar, the stabilizer laid on the bench and while holding the stabilizer I put some pressure on the spar. Just enough to shift the spar down by 1/32" wrt. to the rib. Of course you already know the result: The hole in the rib is off by 1/32. For a -4 rivet that's quarter of a hole. Maybe I now learn to clamp everything, rather than only almost everything like I did so far? I surely hope I do.
