Those tools kept the feeler gauge manufacturers in business- - - - -the best way in the world to destroy a feeler gauge was to try to do a running adjustment on an engine with worn rocker arm tips! The "third hand" tools made it possible to really mangle a feeler gauge blade in a hurry.
Jerry
LOL. I have never tried, nor felt compelled, to adjust valves on a running engine.
Benny Hill theme music starts playing in my head, when I try to even imagine doing it that way.
