The flap "actuator weldment" sits behind the seat bulkhead assembly. It has a forward facing arm that connects with the flap motor, and the rear facing arms connect with the flap pushrods themselves. I forgot to take pictures of all of the little things that had to be done to get it to the point where it was ready to go into the plane (the picture below is still just a test fit). The two plastic blocks on either end that bolt to the bulkhead were super tight, to the point that I was afraid the flap motor wouldn't have enough torque to move things. I re-drilled the 1" hole through each block just to make sure it was the right size (it took off just a tiny bit more material) then took emery cloth to the weldment itself until everything fit a little better. It's still stiff, but within reason and will probably loosen up pretty quick as the metal burnishes the plastic. After having the weldment and those side blocks in and out about 50 times to get a good fit, I temporarily bolted the blocks in so I could place the center supporting block in position. That block (black - hard to see in the picture) also has a 1" hole in it, then got split down the center. Two bolts will connect the two halves and go into nutplates in the floor. I had drill into the floors using the block as a template, then rivet nutplates to the floor. Once all of that was done, I pulled the weldment out and put boiled linseed oil in it as corrosion protection. I'm letting it drip dry for a day or two, then I'll re-install everything and torque the bolts down.
