I've been wanting to learn to use a pivot collar. I thought of this.
I have these hard foam practice golf balls. Very dense foam and water resistant.
I disected one in half. Drilled hole just smaller than the diameter of the jig shaft.
put golf ball above the knob, flat side against the knob. 2 pivot collars for 75 cents.
Now I just need to learn to use them.
Best wishes,
Tim
Clever idea, Tim.
Keep us posted.
Ken