I started out the session by using my torque wrench to set the final tightness of the bolts and nuts that hold the inboard-most ribs to the right main spar. I applied orange torque seal to these nuts after they were torqued as well.
Then I applied final torque to the bols holding the two pushrod brackets in the middle of the spar, and added some safety wire for extra security. The instructions don't say to use safety wire here, but I thought it was a prudent thing to do here so I had ordered my own pre-drilled bolts so that I could.
Next, I used cleco clamps to hold the three doubler blanks to the appropriate places on the rear spar and started match drilling them, inserting more clecos as I went along. The middle doubler also needs a large oval hole to be cut out of it to later allow pushrods to go through it. The hole is already made in the rear spar, so it's just necessary to match the same shape onto the doubler by making smaller holes and enlarging it with metal files. With those holes all made, I unclecoed them, deburred the holes and scuffed them for eventual priming.