Rocker arm play

And FWIW.... I also suspect the loose side clearance for the stamped rockers has to do with:
- The way they oil (With the stamped slot in them, there is really not the same oiling out the sides like in machined rockers.)
- They won't all ride perfectly parallel to each other on the shaft. Being stamped, there is a limit to the parallelism that just can't be as good as a machined part. So some slop is necessary.

Let us know if this does the trick for your tick.