After a few days off, I continued work on the Horizontal. I used the DRDT-2 to dimple the 3/32 (#40) holes in the HS-00901-1 Skins. I used the pneumatic squeezer for a few of the holes on the Skin edges near the leading edge bend. I'm just very cautious about manipulating the bend in the leading edges of the Skins. There were a few holes I had to use the 3/32 Close Quarters Die Set. Here is a video from Mike at Cleaveland Aircraft Tool demonstrating how to use the Die Set.
Below is the outside of the leading edge of the Skin with the male side of the Close Quarters Dimple Die Set installed. You can see the copper mandrel inserted through the Die. As the video shows, you insert the copper mandrel into the pop rivet tool to make the dimple in the Skin. Cleaveland very clearly states this tool will not make the same quality of dimple as the standard Dimple Die Set....and isn't supposed to.
Here's the inside of the leading edge. You can see the female side of the Close Quarters Dimple Die Set and the head of the copper mandrel.
After all the dimpling was completed, the next step was to machine countersink the #40 holes in the Flanges of the Front Spar, Rear Spar, and Stringers. I clamped the Spars to the workbench and drilled away. Here's a picture of the Rear Spar being prepared.....
And completed Stringers.....
