Completed step 1 – machine countersink of HS-12-2 fpr CS4-4 rivets. Used 120 degree countersink which I had learned about from Van forum. Completed step 2 – countersunk HS-1203 for CS4-4 rivets. Completed step 3 machine countersink HS-12-2 forward spar for 3/32 rivets for nutplates. Completed step 4 – machine countersink both HS-1211 spar caps for 3/32 rivets.
