Greetings...
I'm a newbie myself...took a class with hands-on time, but that's it.
I'm not so sure the grinder is the way to remove wood for tenons and laps. At class, we made cros cuts at the shoulders and then drove a chisel in from the end across the cheek. It removed wood FAST! Just be careful to watch the grain...if it slopes towards the cheek as it goes towards the shoulder, take smaller bites.
Joel
