I didn't understand all the fuss over leg vices while I was building one, but now that it's in place I can understand: having the screw 15" from the clamping point produces a huge amount of leverage compared with a shoulder vise or face vise where the pressure is directly on or only 3" below the clamping point.
I'm pretty happy with the old acme screw currently on place, but I now have a 2" coarse tap and am looking forward to adding a wooden wagon vise in the weeks ahead.
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