Took about 1/2 hour to enlarge the holes in the long pushrod, debur, and install the bolts. Took about 1 hour to drill the pushrod supports into position. Of course, I had to take the bolts back out of the long pushrod to get the supports on it. Took about 1/2 hour to clean up the flap pushrods and flap drive rod where the AN4 bolt goes through.