Jeff:
        No need for a hole, just file a flat spot on the leg. It works great.

                                David (dsl82westy)
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Jeffrey Vickers <jeff@VICKERSDESIGN.COM> wrote.
>I was thinking of adding about another half inch or so of metal to
>the end of the knob and then drilling a same sized hole in the table
>leg so that when you tightened the knob it would act as a pin instead
>of just trying to hold the table leg from rotating by friction/brute
>strength alone. You'd only need the one hole in the leg to keep the
>table from swinging in its resting position. Seems like no matter how
>hard I tighten that knob, the motion of the van works it loose. I
>tried a new spring washer---worked a little better.