I recently saw a new product offering from Woodmizer for flatten slabs. Can't remember the name but it looks a lot like their sawmill trailer and mill base with a gantry riding on the rails with some kind of power head in it. That got me to thinking about making a similar device to fit onto my sawmill, maybe using a large router for the powerhead. Alternatively, a small vertical shaft gasoline engine with something like power carver head on it would be even faster. I've flattened quite a few slabs using a router sled but doing it in my shop generates a large mess. An arrangement outside on my sawmill would keep the mess outside and eliminate the need for the router sled at all. Has anyone done something similar to this?

John