I match drilled the F-705G angle to the F-705F channel. The angle was located laterally by dropping a drill bit through the angle and slot channel. Cleco clamps were used to keep the angle butted up against the two channel faces.
I countersunk the holes on the F-705L shim.
On the F-605C doubler, one of the holes has to be countersunk.
Lastly, I got the seat ribs clecoed to the F-704 center bulkhead.
