Dan, this is not a "New" new design, but it is also not the regular vari grind.
The regular vari grind jig still has the spring and knob, this vari grind jig is for the larger super duper beater stick gouges we are seeing on the market these days. One of the reasons I made my own jig was at the time, I could not find a jig that would accomadate my large beater stick, my P&N Super Gouge, it was too thick to fit in the hole.
From Oneway's homepage
If you have the #3074 you have the jig for larger tools.
If you do not have a lot of large tools, I'd return it and get the regular jig, #2840
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward