This week the focus was on steps 1 through 4 on page 14-2 dealing with the stub spar assemblies. Step 2 requires a 120 degree countersink which we didn't have at first. We ordered a set of bits and got them in time for Saturday's session. Both assemblies were then properly countersunk as described in step 2. Holes at the inboard end of the stub spars were 100 degree countersunk in step 3 and then the two stub spar assemblies were riveted together in step 4.