Removed all the clecoes and began riveting the center spar. Now that it's all fitted it's just a matter of process to get it all riveted. First remove the forward uprights then open it up and lean it forward to rivet the rear uprights.
Layout rivet lines on forward uprights, pilot drill forward uprights .
Cleco it all back together, bolt with spacers the forward uprights, back pilot drill fuselage skin. Cleco on the inside where the patch is going.
Draw 10mm offset line from rear edge of fuselage doubler to line up rear upright rivet line.
