Countersink Wing Spars - 3 hours

I had ordered the new parts (hs-00001, hs-00005, hs-710, hs-702) for the VS#2, so until they arrive I decided to move onto the wing spars. I've been doing lot's of reading on other blogs to ensure I have my steps down right.

First I set up the table by applying tape, to protect the spars from scratches. After clamping both spars to the table, I taped the gap between the spar flange and reinforcement spar to ensure I kept metal filings out. Then I began to match drill the #40 holes that hold the platenut rivets.


After the match drilling operations was complete (I checked holes off as I went). I then began to countersink. I tested and re tested the countersink on scrap and have it dialed in perfectly.

 As extra precaution, I have decided to prime the countersunk holes (The instructions mention to do this on the screw countersinks, but I will also do the platenut rivets as well. I used a q-tip and dipped it in primer)