Transferred angles to balsa scrap to set sanding table and sanded in angles on firewall sides to mate up more accruately with fuselage sides. Combination square shows offset.
Tack glued sacrificial, balsa scrap to back of firewall with desired 2 degrees down-thrust at appropriate height and glued firewall to fuselage sides. Placed fuselage above plan view to work over centerline and weighted to immobilize; used square to transpose top of firewall and tack glued firewall in place with CA. Sprayed outsides with Windex to hopefully relieve stresses in wood bending toward firewall.
Fabricated and fit balsa doublers both forward and aft of firewall; applied 30 minute epoxy and clamped to set.