roger lance
Just for grins, I'd like to follow-up on the discussion below that made reference to a new tool/method/technique that was a profound improvement over what had been available to woodworkers.

I'd like to start this list of wonders with an improved tool that some would consider a game changer and nominate the New Concepts saw frames (coping/fret) as a great improvement over prior saws. I find the ease of installing a blade in my NC fret saw as being very much an improvement over my old saw.....a game changer.

So, what will you nominate?? Derek has dips on the CBN wheels.