I screwed up. I misread something about torquing the valve adjusters post-adjustment, and realized I had overtorqued 1-2 of the nut/bolts.
I was fortunate that my local dealer had a pair of each in stock, and I talked to a tech about what I needed to drop to get the bolt replaced since it threads on from the inside.
So I am replacing parts #2 and #3.
One challenge I am having is getting the part shown as #4 out. It has a little up/down and side/side play but not much, and it's not clear to me how it comes out.
Help appreciated!Screen Shot 2013-07-24 at 10.40.16 AM.png