We screwed around alot with the big red toy, and even played with my SC housing, LIM, and fuel rail.
If we'd been strictly business, both of us working (and now that I know a bit more about the process, and don't have to be taught, the two of us could do them in maybe 3 hours? It takes time to clean and rebuild them, and we used the cleaning time (one hour) to look at other stuff.
Each of the 4 tests take one minute each, but there'* setup time too. He also did some setup before I got there, so I'm not sure. I'd guess that if he had it set up already, it would take him 2 hours to do 6 plugs? Maybe 3? The guy is meticulous. Very detail oriented. Alot of his customers are full-time dragstrip guys. Heavy hitters. He'* doing injectors for local mechanics now, too.