First off, Franko6 would have thrown this head to a recycler for scrap after the first machine shop screwed-up the surface with the very rough grind (literally, grind).
The reason the head was off, #3 cylinder was damaged due to a broke-off GP.
Tip: learn the reasons for a flashing GP light.... and none of them have anything to do with a bad GP. (In this case, replacement of the brake light bulbs..[yes the ECU monitors those on each side])
Dmanqso, yes, the machine shop cut each seat and each valve the same, and did the same for the valve stems. They also replaced all valve guides.
In summary: The head, valves, valve stems, and seats were cut beyond any reasonable minimum tolerance specification. IIRC, they took more material from the valves than the seats..... it wasn't a 50/50 thing. Also, if IIRC, the head was milled beyond 0.020 inches.... maybe as much as 0.030. A concrete number just doesn't pop-up in my mind.
I'll tell you how cheap the guy is, I found him a used piston and turbo for $75.00 and he thought that was too much. I got them from Jimbote. Amazingly, that turbo and piston have held up for a long time.... seems this was in late summer, 2010.