I fitted the left aileron and flap on the wing using spacers as described in the building manual. I temporally attached the hinge and flap brackets with clamps and adjusted until I had the required range of motion. I drilled the four holes through the rib webs and brackets at each station. The bottom rear hole at each station is in a very confined space. I used a Dremel tool and long flexible shaft to drill the holes and it worked well. I discovered that my rivet puller will not fit into the space at the bottom rear holes. I bought a cheap rivet puller and ground off the top of the tool . It will just fit in the space to pull those rivets.
