So I guess the question is: What is it you're trying to do that you can't do with the current grind? Then what follows is how do you change the grind to make that possible. In general I find the obsession with certain angles and grinds to be just that, an obsession that has very little to do with getting the job done. Because the tool is hand held you can present any grind in a very wide range of angles and orientations, so the particular angle on the tool is largely irrelevant. I don't remember who it was, but we had a demonstrator years ago who made that point by taking each workshop participant's tool in turn and making a beautiful cut with it despite the fact that every one of them was different (many dramatically so) and most were far from perfect executions of whatever idea or model the owner had in mind. The point he made was take the tool you have and learn how to use it. They most all work. Once you know how to use one well than you have a basis for discovering whether a different grind works better or worse for you, or allows you to do things you couldn't do before.