I need to grind the jaws of my lathe, and the last thing I need to achieve this is to make a mounting bracket for my grinder/router and also to dress the grinding stone. I also need to dress the wheels of my bench grinder. There is the common sprocket-type tool for grinding wheels, but some guys on Youtube prefer to use other means of achieving the same. One tool used a diamond point, and another was a T-shaped tool with a diamond surface. Any recommendations for tools for dressing grinding wheels and sources for them?