I realize not everyone has the luxury of a Bridgeport milling machine available, so I came up with a simple set of tools and instructions to drill the recess in the barrel for the large head screw. If you have questions, please contact me before proceeding.

Install base pin as per the instructions supplied, deepen the latch notch as needed to give the latch full engagement and full depth in the notch.

Notice the crooked head as shown here. The notch must be deepened more to square up this pin with the barrel.

The pointed cap screw is inserted in the base pin and screwed in until it makes firm contact with the barrel.

This is how it should look, lined up properly, and screw tight.

With the front of the frame masked off, LIGHTLY tap the screw with a 2 or 4 Ounce ball peen hammer.

Here's the mark we just made. This is where we will drill our recess in the barrel.

Put one or two layers of masking tape around the barrel to protect the finish, leaving the mark we just made exposed. Place the drilling collar around the barrel and line up the hole with the mark on the barrel. Make sure the hole lines up perfectly with the mark, and snug the collar cap screws securely. CHECK ALIGNMENT AGAIN! Make sure the hole is lined up perfectly. I used a .130" diameter drill with a stop collar on it to drill a recess .070" deep in the barrel as shown in the next photo

Here is our finished job. Please notice, the screw is extra long, and the shank must be filed down until the head of the screw seats firmly into its recess in the Base Pin. The shank of the screw should fit into the drilled recess, but not bottom itself in the recess. This will cause pin bending and the screw will loosen up quickly. Please do not hesitate to contact me if you have any questions.