If I am not mistaken, the need for a single to have a back action lock would not be as great as it is in a double. There would be plenty of bar strength on the off side, right?
Do bar actions have an inherently more powerful spring or a more reliable spring than a back action?

BTW, the item which sparked my original post should arrive today

Clearly, that Max guy doesn't know what a good gun is supposed to look like! Geeeeez...