A stop stop

[morsa]

....The problem is that when the stock is butted against the stop, as the cut nears completion the stock has a tendency to twist between the vise and the stop....

I guess this is the reason why in woodworking you should never make a cut with fixed stops on the miter saw, or radial saw, or use the miter gauge together with the fence on the table saw. For safety, it should be used, instead removable stops.

That's a clever solution, and a wonderful work, but out of my capabilities.