Back drilling rib to spar using holes as a guide and using a long drill

After disassembling the Rib/Spar and deburring reassemble and drill to reinforcement plates

The Plans have the rivet callouts on them. Here you see 10  AN470AD4-4 Rivets will be used to rivet the reinforcement plates on.

Riveting the reinforcement plates

Drilling the skin to the ribs

Drilling skin to the spar using the holes in the skin as a guide.

Use temple to establish angle for drilling the trailing edge

Used the "C" Frame with dimple Dies to do holes in skin.

You can construct the special dimple bar shown in plans for the hard to get rib holes, or I prefer to use the vise grip dimple dies that are included in a lot of the RV builders kits available thru Avery or Cleveland. They work well in tight areas and I consider them one of my required tools.

To do the Spar Flange begin with the dimpling. Here I used my squeeze handles with dimple dies.

Finish by countersinking with micro stop countersink cutting deep enough for rivet

Here you can see the rivet flush with the top of the flange

Counter sink the trailing edge. This needs to be countersunk on both sides

Picture of holding fixture holding the part in place after the bottom skin is cleco on. Ready to rivet

Cleco on the bottom skin using the holding  fixture built from the plans

Rivet the skin to the front spar

Squeeze the skin to rib rivets

Using special bucking bar to buck the last rivet on the rib.