Finally got the unit riveted together, primed, and ready to install. This is firm, stable and fits well. Maintenance access will be convenient.
Dimpled, scuffed, primed, riveted and match drilled all the screw holes. Test assembled with filter/pump assembly enclosed and inserted full assembly into fuselage. Will have to get some grommet edging for the manual elevator trim cable slot.
Final assembly will be possible after the spar bolts are torqued and painted for the center section and all the brake, fuel lines, and electrical runs are secured under the bottom of this assembly.