Hi guys.
For fun, to see if I like a leg vise or not, I made a crude one with a screw and a 2x4 which clamps on to my work bench's leg.
One thing that I noticed is that the slot for the "runner" (which has peg holes drilled in it) at the bottom, if cut perfectly straight, doesn't allow the vise jaw very much rotation and needs to constantly be adjusted and pushed / pulled in and out, or else it will cock in the mortise and lock up similar to a hold fast.
Do you normally cut this mortise with a taper, widening towards the back? Or perhaps do you just cut it larger by 1/4" or 3/8" or something?