The panel structure installation is not going as smoothly as expected. I had to remove the center sectio and some rivets to gain a good access to the rib to firewall rivets.



I then reinstall the two side panels. Here are a few more difficult rivets. I had to alternate the shop heads to be able to buck them.



I the squeeze the two rivets from the center rib to the firewall, but for an unknown reason I had great problems with the lower rivet. A few drill-outs resulted in an enlarged hole and I replaced the rivet with a #8 screw. This is not to be done too often as it would add some weight to tha plane and the cost.