I watched the video and saw that set up. You could probably set it up with a 10 to 14" blade with a table set up. A motor that had enough power to get through hard rock and still tun slow enough not to wobble would be ideal. My brother does quite a bit of fabricating and we went over a concept for one with a 7" grinder as a power unit, similar to the setup in Henk's article. the issue I always come back to is the dust. If you could get that under control that would go a long way.