I spoke to the person who will be doing the machine work on my M103 head. I had a bit of difficulty understanding exactly what set-up he wanted for shipping. I asked again and still am uncertain. Hopefully you guys can help. He wants the valve spring springs to not be compressed. Can I do this by loosening the 4 bolts on that secure each pair of valves? Is this standard procedure when sending the head of to be worked on. Should I just remove the entire assembly on top? If any of you have done this, please let me know.