S90: Wear Limit

Nice long Saturday morning garage session.  Actually got way more accomplished than I thought I would, especially considering I didn't know exactly what I wanted to work on.  But I did have a new micrometer and caliper to play with, along with the new valve compressor tool, so I figured I'd dig into the S90 top end again.
 
The caliper and micrometer I'm using are dirt cheap compared to top end measurement tools, but they seem to be sturdy and accurate enough for this type of shade tree work.  I did get different answers when I measured the same part with first the caliper then the micrometer.  Maybe one needs to be zeroed a little better, but it could also be my "technique".

I took measurements on the camshaft, rocker arms and rocker shafts, valve stem, and valve springs.  The only thing that seemed to be past the wear limit was the right side end of the camshaft.  The wear limit in Clymer's said 0.705" and the micrometer was reading 0.7045".

One odd thing I also found was that when measuring the inside diameter of the rocker arm bore, I was getting a measurement of 0.390".  But the standard was 0.3937"-0.3943" - meaning the hole was actually smaller than standard factory settings...?  I probably took a bad measurement, though, because the outer diameter of the shaft measured 0.392".  In other words, the shaft would be too big to fit into the rocker arm!  Clearly not the case...