Finished prep both rear spars - match drilled all doubler plates, deburred holes, countersunk requisite holes in one. Also did aileron pushrod hole matched to spar (pic 2) as i did yesterday with other spar.Then, drilled #40 holes top flange of spar where all doubler plates exist, deburred, dimpled. It is important to dimple the top holes where the fuselage attach doublers are, since the holes will be difficult to reach when the doublers are riveted. Everything primed, ready for assembly.
Rear spar parts primed.
Spar doubler plate that reinforces aileron bracket attachment point.
