Changes
/* Z80 Shims */
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* The one to the right is the optimal choice, it has gold plated pins with a circular cross section having a diameter of about .45mm. The shorter end is soldered into the pad on the shim board from the underside. This pin design gives more clearance on the top side of the board for you to fit a low profile IC socket, saving height. I use these when building shims for other people.
* The middle one is a "standard" pin header with a square cross section and width of about .65mm. Avoid like the plague, as it will damage the main board socket.
* The left hand one is a sort of combined pin and socket with an acceptable diameter end. It looks tall but as it includes the socket pins it makes the shim easier to build.