[Dukedesmo]

You can get a much better 'feel' for valves if you turn the cam by hand, especially if looking for tighter closer clearances. IMO as tight as possible is better but obviously without any binding.

I find that once you are reasonably happy with the clearances, you can feel just how tight, tight really is by sticking a feeler in the gap (to take up the clearance) and then turning by hand to feel any drag...