Cleco the F-6124 Trim Bracket to the F-939 Right Forward Seat Floor and using the previously drilled hole at the center of the F-7123 Pivot Block hole, using a unibit I drilled 9/16" hole in the bracket and the seat floor. Drill, cut and notch Pivot Block as per F-7123 Aileron Trim Pivot Block Detail. Match drill the two holes from the pivot block into F-6124 Trim Bracket. Very tedious job that requires lots of measuring and attention to do it right.