|To get started mounting a finder or other accessory on my clamps, drill|
a #7 hole in the dovetail base or similar mounting hardware.
|Use a 1/4-20 "tap" to put threads in the hole. I usually cut off a|
carriage bolt that's long enough for this chore. If you ""flatten"" one
end with a hammer it'll fit into the threaded hole and stay there firmly.
|I use a 2" fender washer under the dovetail. Put the dovetail-shaft|
through the hole in the clamp and use a knob.
Note the ""locking" 1/4-20 nylon screw in the side of the clamp
so as to keep everything in place.